CRYOSTATION BASE PLATFORMS CRYO-OPTIC TECHNOLOGY MAGNETIC FIELD CONTROL ACCESSORIES

Transcription

1 CRYOSTATION BASE PLATFORMS CRYO-OPTIC TECHNOLOGY MAGNETIC FIELD CONTROL ACCESSORIES

2 CRYOGENIC MEASUREMENT SOLUTIONS TO CRYOSTATION BASE PLATFORMS CRYOSTATION C2 3.2K - 350K low vibration closed cycle cryostat FUSION F2 Intermediate sample chamber size with integrated cold sample electronics NANOSCALE WORKSTATION NW2 Large cooled breadboard platform with 8 optical access ports CRYO-OPTIC TECHNOLOGY CRYO-OPTIC MICROSCOPE Vertical high NA objective with unparalleled accuracy CRYO-OPTIC X-PLANE Horizontal high NA objective with optimized optical stability Optional customized optics train with integrated spectrometer available 2

3 FIT YOUR NEEDS ACCESSORIES HILA WORKSTATION High Inertia Low Acceleration platform AGILE TEMPERATURE SAMPLE MOUNT Eliminates drift and allows for variable temperature studies CUSTOM OPTIONS Numerous modifications and add-ons have been developed to satisfy various application requirements. In addition, we pride ourselves in being able to customize our platforms for a researcher s unique needs. MAGNETIC FIELD CONTROL CRYOSTATION MAGNETO-OPTIC Integrated bipolar magnet capable of fields up to 1.0 Tesla CRYOSTATION CRYOFMR Variable temperature CPW-FMR spectrometer CRYOSTATION NANOMOKE Low temperature magneto-optical magnetometer and Kerr microscope 3

4 A STRONG FOUNDATION: SIMPLICITY WITH ACCESS AND FLEXIBILITY The modular nature of the Cryostation allows the researcher to configure the sample space while still enjoying the benefits of a stable, automated, and controlled system. Simply lift off the entire window assembly and radiation shield for unobstructed access to the sample, which can be rigidly mounted to any optical table. Setup and begin your experiment with the sample completely accessible at room temperature. Then, when you re ready to cool down, simply replace the radiation shield and window assembly and continue the experiment at low temperatures. The sample alignment and electrical connections to the sample space remain undisturbed. CONTROL AND AUTOMATION The Cryostation s automation puts it in a different class from all other available instruments. Automatic pumpout, cooldown, and active temperature stabilization, as well as automatic warmup, vent, and clean gas purge save time and complexity and protect the system and sample from contamination. These processes are continuously monitored to detect leaks, identify thermometry problems, and perform other critical self-check functions. High-speed cooldown and power-saving standby modes make the instrument more productive and efficient. The computer-controlled user interface allows you to link the Cryostation to other instruments and software, such as LabView, via TCP/IP. Take control or monitor your experiments from your office computer or any other computer with network access. FULLY-INTEGRATED SIMPLICITY The turn-key system includes the Cryostat, Control Unit, Compressor, and User Interface PC. Simply set the target temperature and the Cryostation will do the rest. FOUNDATION THE STANDARD CRYOSTATION COMES WITH THE FOLLOWING: CONTROL UNIT The control unit houses all of the electronics for the system. The vacuum gauge, nitrogen purge components, and vacuum pump are also located in the control unit. It connects to the User Interface PC via a USB cable. COMPRESSOR The compressor provides the pressurized helium via the supply/return hoses to the cryostat. The compressor will automatically start and actively adjust parameters for optimal cooldown. USER INTERFACE PC The laptop provides the user interface to control the cryostat. The software allows the user to monitor the status of the system parameters and automatically control sample temperature. CRYOSTAT The unique tabletop architecture of the cryostat easily integrates into any lab setup. The sample space consists of the sample mount, which sits on the sample platform. The radiation shield surrounds the sample space and insulates it from room temperature radiation. The vacuum housing surrounds the radiation shield and defines the outer optical interface to the system. 4

5 UNMATCHED STABILITY USER INTERFACE KEY FEATURES Control via Windows based software on mini-laptop computer -Displays real time temperature stability -Logs cool downs -Built in diagnostics KEY BENEFITS -Simply press a button for fully automated cool down, warmup, temperature control and more REMOTE INTERFACE COMPRESSOR TCP/IP and LabVIEW -Automation Scripting -External Control Variable Flow Helium Compressor -Single-phase 50/60 Hz, VAC, air cooled compressor, 1-2kW -Conveniently control from your office or cellphone -Solve issues quickly with remote customer service -No need for water cooling infrastructure -Quiet and easy to work next to all day (60-65dB) SAMPLE MOUNTING NUMERICAL APERTURE Sample in vacuum -Microscopy/Spectroscopy sample mount included Configurable to 0.87NA with sample near window -Allows many orientations -Easily integrate with your unique experimental needs with options to customize -Easily reconfigured using standard sample mount SAMPLE DRIFT OPTICAL SUBSTRATES CTE-cancelling sample platform -Optimized at center of platform Fused silica AR coated nm -User replaceable with other substrates -Low drift over the full temperature range -Easily swap out windows to fit the needs of each unique experiment THERMAL STABILITY Long term temperature stability of less than 10mK is achieved through the use of proprietary thermal damping technologies. Once at the setpoint temperature, the Cryostation applies active and passive thermal stabilization to achieve greater than a 20X reduction in cryocooler-induced thermal fluctuations at the sample. Temperature (Kelvin) Cryostation C2 Temperature Stability ~7mK Time (Min) Sample stage positional drift has been virtually eliminated by the use of a thermal contraction cancelling cryogenic support. With this kind of stability, there is no need to re-align or refocus optics at each new temperature measurement point. This opens up the door to total experiment automation. VIBRATIONAL STABILITY The patented architecture of the Cryostation isolates both the sample and the sensitive equipment on the optical table from the cryocooler vibrations. Vibrations on each standard system measured at factory are less than 5 nanometers. No dedicated table or external support structures are needed, and no liquid or gaseous helium is required. Simply set the instrument on any optical table, insert a sample and click Cooldown. Visit our web site to see how we measured vibrations with sub-nanometer accuracy. Sample Stage Displacement (nm) Cryostation C2 Sample Stage Vibration (data taken <4K) Time (Sec) ~3.5 nanometers peak to peak 5

6 BASE SAMPLE PLATFORMS CRYOSTATION C2 This turn-key system is the leader in its field due to its low vibrations (< 5nm), its stable thermal performance (+/- 5mK) at base temperature, and its easy access to the sample. The C2 provides a stable and automated environment for enabling low temperature measurements. THERMAL PERFORMANCE Intuitive temperature control, optimized wide-range temperature stability, and quick speeds to set-point. VIBRATIONAL STABILITY Patented tabletop architecture and other design innovations provide leading positional stability. FLEXIBILITY & MODULARITY The sample space can be configured to meet the unique needs of each experiment. FUSION F2 With an inside radiation shield diameter of 3.75, the Fusion provides the perfect intermediate sample chamber size for increased experimental flexibility without sacrificing base temperature or cooldown time. A modular circuit board allows for robust customization and flexibility. VOLUME OPTIMIZATION Leverage more than 2x the working volume of the standard C2 to add additional equipment, such as wiring or multiple piezo stacks. OPTICAL ACCESS Elevated beam height (126mm) to allow for transmission measurements on standard piezo positioners. SEAMLESS INTEGRATION An integrated and modular cold circuit board makes the system easier to use, eliminating the need to route and thermally lag wiring. NANOSCALE WORKSTATION NW2 Imagine having the freedom to integrate a sample with multiple probes, nanopositioners and free-space optics right onto the cold platform. With the NW2, the cold platform simply becomes an extension of the optical table. FLEXIBLE EXPERIMENTAL SETUP Integrate components directly onto the interchangeable cold breadboard. VERSATILE SAMPLE SPACE The large sample platform offers the space for a multitude of configurations. 6

7 CONTROL THE ENVIRONMENT SPECIFICATIONS CRYOSTATION FUSION NANOSCALE C2 F2 WORKSTATION NW2 PERFORMANCE DATA Temperature Range 3.2K - 350K 3.2K - 350K 4.3K - 350K Temperature Stability Vibrational Stability Cool Down Time to 4.2K <10mK <0.65nm <5nm ~2hrs <10mK - <10nm ~3.5hrs <20mK <2nm <15nm ~10hrs peak to peak (w/ damped sample mount) RMS peak to peak OPTICAL PROPERTIES Optical Access 5 optical ports 5 optical ports 8 optical ports C2 & F2: 4 radial + 1 top axial in housing, 6th optional NW2: 7 radial + 1 top axial in housing Acceptance Angle 60 full angle 80 full angle 120 full angle 30 full angle 80 full angle 120 full angle 16 full angle 80 full angle 120 full angle Sample at center of sample space Sample located near cold window Sample located near warm window Working Distance 13.5mm horizontal 7.9mm vertical 21mm horizontal 7.9mm vertical 17.5mm horizontal 10.5mm vertical Options for <1mm available FEATURES Electrical Access 29 feedthroughs 34 feedthroughs 29 feedthroughs To mini-connector terminations near sample (piezos use 6 of these) Thermal Lagging Temperature Sensors DIMENSIONS Sample Space (diameter x height) Breadboard Platform 2 locations 2 Calibrated Cernox Ø53mm x 63mm 4 locations 2 Calibrated Cernox Ø95mm x 100mm Modular 7 locations 2 Calibrated Cernox Ø195mm x 72mm 130mm or 190mm 12.5mm To radiation shield Corresponding to platform and sample temperature Location for 1 user thermometer available Multitude of customized options available to enlarge (C2 only) 25mm radiation shield lagging band Grid of mounting holes OPTIONS Interface Panels Piezo Positioners 2 5 x 5 x 5mm 10.5nm 0.8μm 4 5 x 5 x 5mm 10.5nm 0.8μm 8 5 x 5 x 5mm 10.5nm 0.8μm RF, DC, fiber or gas tube options available Travel XYZ Typical step size Scan possible at 4K Product specifications are based on a standard system; various options, configurations, and/or custom modifications may cause slight differences. Specifications and other information subject to change without notice. Represents anticipated performance based on advance design work. 7

8 MAGNETIC FIELD CONTROL WITH MEASUREMENT MAGNETO-OPTIC MODULE The Magneto-Optic module takes the standard Cryostation and adds up to a 1.0 Tesla magnetic field with incredible optical access and experimental flexibility. Optical access through the poles, high NA access from the sides, and low working distance access from the top make demanding magnetic applications simple to set up. FEATURES: Exchangeable pole tips for controlling field strength, or for specific requirements Integrated lens holder in the pole tips supports a small lens near the sample Thin radiation windows between the sample and the pole keep the sample below 3.4K Easily remove magnets and window housing for great sample access during setup Electromagnet may also be used as an independent stand-alone unit for room temperature measurements separate from the Cryostation MAGNETO- OPTIC MODULE INCLUDES BIPOLAR POWER SUPPLY INTEGRATIONS CryoFMR This system turns the Cryostation with Magneto-Optic into a turn-key, variable temperature Coplanar Waveguide Ferromagnetic Resonance (CPW-FMR) spectrometer. Extracts the temperature dependent M s, damping, inhomogenous broadening and gyromagnetic ratio Includes a CPW waveguide with coaxial cables for an Adjustable Vertical and Horizontal Mount CRYOFMR SETUP NanoMOKE This system combines the powerful capabilities of the Durham Magneto-Optics NanoMOKE3 with the flexibility of the Cryostation for low temperature Magneto-Optic Kerr Effect (MOKE) applications. The optical head for the NanoMOKE views the sample through a side window on the Cryostation Includes sample holder assembly for both Longitudinal/Transverse MOKE & Polar MOKE configurations FEATURES: Integrated power supply and coil cooling system Bipolar supply lets you study field continuous through 0 Interface on front panel gives status at a glance 8

9 INTEGRATION OPTIONS SPECIFICATIONS CRYOSTATION CRYOSTATION Magneto-Optic CryoFMR PERFORMANCE DATA Temperature Range 3.4K - 350K 10K - 350K Temperature Stability Vibrational Stability Cool Down Time to 4.2K <10mK <0.65nm <5nm ~3hrs <10mK <0.65nm <5nm ~3hrs peak to peak (w/ damped sample mount) RMS peak to peak Magnetic Field 0.45 Tesla 0.6 Tesla 0.7 Tesla 1 Tesla 0.45 Tesla 0.6 Tesla 0.7 Tesla 20mm pole spacing 16mm pole spacing 12mm pole spacing 5mm pole spacing (higher base temp) Resolution <5 μtesla <5 μtesla Calibration Hall Probe Hall Probe Calibration sensor provided OPTICAL PROPERTIES Optical Access Working Distance FEATURES Electrical Access Thermal Lagging Temperature Sensors DIMENSIONS Sample Space (diameter x height) OPTIONS Interface Panels Piezo Positioners FMR SPECIFICATIONS 5 optical ports 44.4mm side window 7.9mm top window * 29 feedthroughs 2 locations 2 Calibrated Cernox Ø7mm x 23mm Ø11mm x 23mm Ø15mm x 23mm 1 5 x 5 x 5mm 10.5nm 0.8μm 4 optical ports 44.4mm side window 7.9mm top window * 29 feedthroughs 2 locations 2 Calibrated Cernox Ø7mm x 23mm Ø11mm x 23mm Ø15mm x 23mm 1 One 5mm top port Two 50mm side ports Two 6mm bores through magnet winding *Recessed objective To mini-connector terminations near sample (piezos use 6 of these) To radiation shield Corresponding to platform and sample temperature Location for 1 user thermometer available 12mm pole spacing 16mm pole spacing 20mm pole spacing RF, DC, fiber or gas tube options available Travel XYZ Typical step size Scan possible at 4K Magnet Control Field Strength Field Resolution RF Source Readout AC Field Modulation Analog voltage control to Oe continuous through B=0 +/- 21 μt Range: 2 to 17 GHz Accuracy +/-0.05 GHz Range: -10 V to +10 V with 16 bit resolution. Max sampling rate 5 ks/s Variable up to 1 Oe peak-to-peak with modulation coils Product specifications are based on a standard system; various options, configurations, and/or custom modifications may cause slight differences. Specifications and other information subject to change without notice. See datasheet for NanoMOKE specifications 9

10 HIGH NA IMAGING WITH DRIFT-FREE Housing Lid TECHNOLOGY Revolutionary Cryo-Optic technology allows cryogenic researchers to focus on samples at temperatures down to 3.5K. Drift is virtually eliminated using our patent pending design, including low drift during cooldown. Sample translation and focus is accomplished with built-in nanopositioners. The temperature of the high magnification objective and the sample are controlled to better than 0.01 degrees for stable optical performance. A backup power supply is provided to ensure performance. Exterior Housing Heater Ring with Backup Heater Cryo-Optic Microscope Objective Allows Vertical Lens Positioning Radiation Shield XYZ Nano Positioners Pinned Interface for Precise Alignment Base With Low Vibration Cold Platform THE SOLUTION TO DRIFT Drift is often correlated to room temperature variations. The temperature stability of the system was tested in an experiment where the room temperature was dropped by 10C for an hour. There was no appreciable change in the sample or objective temperature over that period. The sample drift was less than the diffraction limit. BASED ON HIGH PERFORMANCE ZEISS OPTICS The system is designed using a custom vacuum-compatible version of the Zeiss EC Epiplan-Neofluar 100x infinity color corrected objective with 0.90 NA and 0.31mm working distance. For longer working distance (4.0mm), the LD EC Epiplan-Neofluar (100x/0.75 NA) is also available. 10

11 CRYO-OPTIC TECHNOLOGY WHITE LIGHT IMAGING A 3D calibration grid was imaged to demonstrate the system resolution. Fig. 1 shows the actual cal target. Fig. 2 was imaged by our system, with 14 pixels across the 1.2μm feature, or an effective pixel size less than 0.1μm. Figure 1 Figure 2 DRIFT-FREE HIGH NUMERICAL APERTURE CONFOCAL MICROSCOPY OF SINGLE MOLECULES IN A CLOSED CYCLE HELIUM CRYOSTAT Figure 4 Optical microscopy of individual quantum objects has been at the heart of some of the most outstanding new developments in quantum physics over the past decade, especially in quantum information processing, quantum sensing and quantum metrology. Optical measurements at low temperatures are key to future discoveries. Figure 3 microns Figure 5 CRYO-OPTIC MICROSCOPE This experiment demonstrates drift free high numerical aperture confocal microscopy of single molecules at 3.5K in a closed cycle cryostat. The samples are nitrogen vacancy (NV) centers in diamond that are known to be relatively dark single photon sources, which can be imaged only with well corrected microscope objectives with the highest numerical apertures. Fig. 3 shows a schematic of the confocal cryogenic microscope setup. counts Figure 6 microns Intensity RESULTANT IMAGES Fig. 4 shows a 20µm x 20µm view of a Nitrogen Vacancy center. Fig. 5 shows a single dot with a 2µm x 2µm field of view. Fig. 6 is a plot of a data slice through the dot center, showing high collected return counts from the NV center microns

12 FLEXIBLE CRYO-OPTIC SETUPS TO FIT CRYO-OPTIC MICROSCOPE The original Cryo-Optic was designed for confocal microscopy to eliminate drift. The vacuum housing has a side port to allow the user to see the sample and working distance. Built-in piezo based nanopositioners allow 5mm motion in X, Y and Z for site location and focus. Just lift off the housing, unbolt and remove the radiation shield and your sample and wiring are fully available for changes. CRYO-OPTIC X-PLANE Leveraging our Cryo-Optic technology, a new horizontal objective design provides seamless integration with other optical measurement systems while maintaining easy access to the sample. This revolutionary design eliminates the alignment and drift challenges associated with using high performance optics in a cryogenic setup. Optional modular configurations allow users to choose a custom spectrometer and optical train setup for a complete measurement solution. EASY INTEGRATION Horizontal beam path allows for immediate, simple, and direct integration into various measurement systems & experimental setups (see pg 14 for details). CONVENIENT SAMPLE ACCESS Samples can be easily exchanged or adjusted without removing the objective, ensuring consistent optical alignment and performance. THERMAL STABILITY The objective is supported on an independent thermal stage which is PID stabilized to 310 +/- 10mK ptp. ELIMINATES OPTICAL DRIFT The objective remains positionally and thermally stabilized across large temperature changes (350K - 4.2K). CRYO-OPTIC NW2 The Cryo-Optic is available in horizontal format in the Nanoscale Workstation. This provides simple integration into your in-plane optical setup. Remove the lid for easy sample access. There is ample room on the cold breadboard for free space optics, enabling transmission experiments and piezo interface control. 12

13 YOUR EXPERIMENT SPECIFICATIONS CRYO-OPTIC CRYO-OPTIC CRYO-OPTIC X-PLANE MICROSCOPE NW2 PERFORMANCE DATA Temperature Range 3.4K - 350K 3.7K - 350K 4.9K - 350K Sample mount temperature Temperature Stability <10mK <10mK <20mK Peak to peak (w/ damped sample mount) Vibrational Stability <5nm <50nm <10nm <100nm <15nm Peak to peak with positioners Cool Down Time to 4.2K ~2.5hrs ~6hrs ~12hrs Stabilization Time <1min ~20mins w/ ATSM for 50K temp change Sample Drift <1μm / degree <100nm <1μm / degree <100nm <1μm / degree <100nm During cool down when stable OPTICAL PROPERTIES Optical Access Numerical Aperture Working Distance Objective Type FEATURES Electrical Access Thermal Lagging Temperature Sensors DIMENSIONS Sample Space (diameter x height) Breadboard Platform 5 optical ports 0.75 or 0.9* 4mm or 310μm Zeiss 100x/0.9DIC* Zeiss 100x/0.75DIC 34 feedthroughs 4 locations 2 Calibrated Cernox Ø95mm x 100mm 5 optical ports 0.75 or 0.9 4mm or 310μm Zeiss 100x/0.9DIC Zeiss 100x/0.75DIC 20 feedthroughs 2 locations 2 Calibrated Cernox Ø63mm x 53mm 8 optical ports 0.75 or 0.9 4mm or 310μm Zeiss 100x/0.9DIC Zeiss 100x/0.75DIC 20 feedthroughs 7 locations 2 Calibrated Cernox Ø197mm x 71mm 130mm or 190mm 12.5mm X-Plane: 4 radial (1 w/ horizontal objective) + 1 top axial in housing Micro: 4 radial + 1 top axial in housing w/ vertical objective NW2: 7 radial (1 w/ horizontal objective) + 1 top axial in housing 0.7 NA = 3.5mm 0.9 NA EC Epiplan-Neofluar LD EC Epiplan-Neofluar *Integrated w/ extra customization To mini-connector terminations near sample (piezos use 6 of these) To radiation shield Corresponding to platform and sample temperature Location for 1 user thermometer available 25mm radiation shield lagging band Grid of mounting holes OPTIONS Interface Panels Piezo Positioners 4 5 x 5 x 5mm 10.5nm 0.8μm 2 5 x 5 x 5mm 10.5nm 0.8μm 8 5 x 5 x 5mm 10.5nm 0.8μm RF, DC, fiber or gas tube options available Travel XYZ Typical step size Scan possible at 4k Product specifications are based on a standard system; various options, configurations, and/or custom modifications may cause slight differences. Specifications and other information subject to change without notice. Represents anticipated performance based on advance design work. 13

14 SPECTROMETER INTEGRATION CRYO-OPTIC X-PLANE WITH OPTIONAL SPECTROMETER INTEGRATION The Cryo-Optic X-Plane was specially designed for integration with a full measurement system. The sample space and objective can be coupled directly to many third-party optical spectrometers through a configurable breadboard space with optical access, quick access panels, and optional optics including CCD, integrated white light source, and more. This unique interface allows for real-time imaging and alignment. X-PLANE SPECIFICATIONS Beam Height Sample Space Positional Stability Along Optical Axis Positional Stability in Focal Plane 100 mm (higher options available) Integrated stages & ATSM* Objective-sample displacement across K: <20 um Time to stability** after 50 K sample temperature change (w/ ATSM): <30 sec (over full range) Objective-sample displacement across K: <32 um Time to stability** after 50 K sample temperature change (w/ ATSM): <30 sec (over full range) *Stages can be recessed or mounted on platform **Time to positional stability defined as the time required before which the sample position drifts by no more than 250nm in 30mins 14 FEATURES: Configurable and exchangeable optical layout space Clean, dust-free environment Robust and mobile optical experimental platform Environment devoid of stray light for sensitive long acquisition applications The figure to the right shows a basic scanning setup with integrated white light source for the Cryo-Optic X-Plane. This represents just one possible configuration of this modular system. The optional optical train component can be configured for your unique setup, and the entire system can be customized for seamless integration with a third party spectrometer.

15 AGILE TEMPERATURE SAMPLE MOUNT The Agile Temperature Sample Mount (ATSM) provides the solution for the highest level of positional stability for step-static and dynamic temperature changes from <4K to 350K while improving the speed to each set point. The unique position stabilizing support structure optimizes stage mechanical stiffness and rigidity while providing the thermal performance required for fast temperature changes. The structure reduces thermal contraction to below 30um over the entire temperature range from <4K to 350K. This technology eliminates the need to re-focus after small temperature changes. Ultimately, you can be confident that an optimized focus will remain stable throughout a measurement. THERMAL CONTROL The ATSM form factor integrates on top of the positioner flex link, heating only the sample locally. The system is controlled from a high speed temperature controller for rapid thermal response and time to stability. OPTIMIZED PERFORMANCE The sample mount allows you to get the most out of high numerical aperture and low working distance optical setups, such as when used with the Montana Instrument s Cryo-Optic products. ATSM SPECIFICATIONS Range Temperature Stability Thermometer Drift Over Full T Range Resonance 292K Typical Heating Rate Base -350 K < 50 mk (p-p)* Cernox CX-1050-HT < 30 μm** > 5 khz 300 K / 5 min LOW DRIFT & FAST SETTLING TIME The unique position stabilizing support structure optimizes stage mechanical stiffness and rigidity while providing the thermal performance required for fast temperature changes. Typical Cooling Rate Temperature Gradient Control Connections 300 K / 5 min 0.2 K above platform 2 heater + 4 thermometer *Stability over 15 minutes **Measured at center and edge of 3x3mm calibration grating Galvo Scanners Scan Lens Tube Lens BS Objective DETECTION Beam Expander CCD BS CRYO-OPTIC X-PLANE THIRD PARTY SPECTROMETER BS Condenser Notch Filter ND Filter White Light Source 1/2 Wave Plate WHITE LIGHT IMAGING Polarizer ENCLOSED OPTICAL TRAIN ILLUMINATION 15

16 HILA WORKSTATION HIGH INERTIA LOW ACCELERATION The HILA (High Inertia, Low Acceleration) Workstation was designed to provide an ultra-stable mechanical environment for cryogenic measurements. The system leverages advanced vibration isolation technology featuring a very low natural frequency together with mass compensation technology for full isolation of external vibrations. Energy within the sample space is minimized, creating the ideal environment for sensitive SPM or resonant cavity applications In the chart to the left, the blue line represents accelerations of the isolated platform with HILA technology. The spikes in the gray line represent pulses of the cold head. Accelerations (g) Platform Accelerations <1 μg/ Hz Time (Sec) FEATURES: Mass compensation technology allows users to configure the instrument for various masses and mass distributions while retaining a balanced and level cold platform Low resonance technology isolates the sample platform from the cold head to drastically reduce the impact of the cryocooler pulse on sample vibrations Allows for flexible experimental configurations up to Ø170mm Integrated cold circuit board eliminates the need to thermally lag standard DC feedthroughs to reduce heat load to the sample Easy change to split table operation for even lower accelerations HILA SPECIFICATIONS Temperature Range Base Temperature Stability Accelerations Cool Down Time Optical Access Electrical Access Sample Space Breadboard Platform Interface Panels Represents anticipated performance based on advance design work and early testing prototypes. 4 K K <10 mk (ptp) <1 μg/ Hz (1-100 Hz) ~8 hrs 8 optical ports (7 45 spacing, 1 overhead) 29 DC feedthroughs Ø170 mm (inner) x 73 mm (height) 133 mm (12.5 mm M3 grid of mounting holes) 2 (DC or fiber options available) 16

17 PIEZO POSITIONING INTERNAL PIEZO OPTIONS The Montana Instruments Cryostation can incorporate precision nano-positioning stages on the standard platform or by using an optional recessed platform. These piezo motion stages are integrated into the cold space for translating, rotating, or tilting your sample. Montana Instruments integrates and tests the unit so it is ready when you are. PARALLEL PLATE FLEXIBLE THERMAL LINK When piezo stages are used without the recessed platform of the Recessed Piezo Ready version, they require a flexible thermal link to thermally connect the cold stage to the sample mount. These keep the sample within 0.2K of the platform. Sizes are available for 1 to 6 stages. RECESSED PIEZO PLATFORM With the recessed platform option, a nano-positioning insert holds the stages and is inserted into the recessed pocket in the housing base. This option also comes with a Raised Platform so the system can be used without the pocket and stages, if desired. AVAILABLE OPTIONS There are several approaches to move your sample with respect to the optics: Attocube precision motion stages are available in linear (x/y/z), rotation, or tilt configurations and may be stacked. Janssen Precision Engineering offers translation, rotation, and hexapod positioning configurations. Other nanopositioners designed specifically for cryogenic environments are available with unique technological features and benefits. Consult with Montana Instruments for help choosing the best positioning solution for your setup and application. 17

18 SAMPLE HOUSING CONFIGURATIONS HOUSING AND LID OPTIONS There are several window options for optical access to your sample space on the Cryostation. STYLE STANDARD WINDOW ASSEMBLY OUTER WARM WINDOW DIA. 50mm INNER COLD WINDOW DIA. 30mm BEAM HEIGHT 90mm SAMPLE SPACE HEIGHT 63mm The standard configuration has 50mm (A,C) outer warm windows which are used with 30mm inner cold windows. This option provides a high level of optical access. The low profile windows are 30mm (B,D) diameter outer warm windows with 20mm inner cold windows. A 45 degree rotated housing (E) is offered for users who may need to interface with large equipment and need ample access to the side windows. LOW PROFILE WINDOW ASSEMBLY 45 DEGREE ROTATED 3 WINDOW ASSEMBLY 100 MM TALL WINDOW ASSEMBLY 130MM TALL HOUSING 30mm 50mm 50mm none 20mm 30mm 30mm none 75mm 90mm 126mm n/a 38mm 63mm 100mm 130mm Tall housing options include the 100mm tall window assembly (F), which provides a larger sample space for integration with piezo stages. Also offered is the 130mm tall housing (G), which does not have windows, but is useful for options where a top window only is needed. Below is a summary of housing styles. A B C D E F G LOW WORKING DISTANCE OPTION A popular option, the low working distance allows users to use external optics and achieve a working distance as low as 1mm. The components to achieve the low working distance configuration include a thin vacuum window, a raised radiation aperture, and a thin radiation window. The sample can be placed close to the overhead optic. This option is only offered with the 50mm top window. A variation of this option allows translation of larger samples. See data sheets for drawings and explanations. Vacuum Window Vacuum Window Holder Radiation Aperture and Window Adaptor Ring 30mm Window Ring 18

19 CASTLE OPTIONS Montana Instruments has created numerous custom designs of the sample housing to accommodate customer s research needs. Here are several examples of castles designed for various experimental setups. The Tall Round Castle (A) was designed such that a superconducting magnet with room temperature bore could be placed around the top portion of the castle. This allows overhead viewing of the sample. The Tall Rectangular Castle (B) was designed for use with GMW magnet poles or other external magnets. The windows on the side also allow the castle to be used for low working distance applications. A B E CASTLE OPTIONS WITH MAGNETIC FIELDS Montana Instruments has designed several customized castle structures for use with third party magnets, typically GMW magnets with high magnetic fields (several Tesla). These castles are designed for the specific experimental setup and are integrated by the user. Several options can be configured with the castle such as RF coaxial cables, positioners, and sample mounts that include electrical transport measurement options. The High NA castle (C) was developed specifically for low working distances and high numerical aperture transmission experiments. C F The Piezo Rectangular Castle (D) allows the use of piezos to move the sample in the rectangular castle format. The Low Working Distance Rectangular Castle (E) allows low working distance and convenient electrical cabling in the rectangular castle format. D The Short Round Castle (F) has a 1 OD and allows low working distance overhead. CASTLE OPTIONS REQUIRING LOW WORKING DISTANCE & TRANSMISSION Montana Instruments has developed castles customized for applications requiring transmission and/or low working distance. Engineers at Montana Instruments work with users to determine the design that works best for their research needs. Options that can be included in these customized castles include positioners, RF coax cables, and customized sample mounts designed with the user s application in mind. 19

20 INTERFACING OPTIONS BASE INTERFACE PANEL OPTIONS Connections can be made to your sample through the base of the sample chamber or through the windows. The Cryostation sample chamber base can be provided with 1 or 2 interface plates (options exist to extend to 4). The Nanoscale Workstation has 8 base side panels standard. It is generally easier to secure and thermally lag complex connections through the base. These remain fixed and allow simple removal of the housing for sample access. A blank side panel is available with this option for customer configuration. Please contact Montana Instruments for customized interfaces through these side panels. INTERFACE BASE SIDE 30mm 50mm PANEL OPTICAL PORT OPTICAL PORT FIBER FC/PC CONNECTOR FIBER COMPRESSION FITTING (UP TO 3 FIBERS PER SETTING) COAX SMA TO SMP Many connections can be added through unused optical ports or the base side panels through feedthroughs. For example, coax interfaces are available using hermetic SMA-SMP feedthroughs in either a 30mm or 50mm optical port. Similarly, fiber optics can be interfaced using either hermetic FC/PC connectors or using a compression fitting. See the table above for available options. THROUGH WINDOW INTERFACE OPTIONS Many connections can be added through unused optical ports using feedthroughs. For example, interfaces are available for a single coax (SMA-SMP) through either a 30mm or 50mm port. A Quad RF option is available for a 50mm port. The internal cables should be lagged using the radiation shield to minimize heat introduction. Provisions are available for single fiber optics in a 30mm or single or double fibers in a 50mm port. High Voltage (12kV) may also be introduced through a 50mm port. Fiber in 30mm port SMA in 30mm port FC/PC in 30mm port Dual FC/PC in 50mm port Compression Feedthrough in 50mm port Compression Feedthrough in Base Side panel 20

21 WIRING GUIDE PLATFORM TEMPERATURE RISE FOR VARIOUS WIRE TYPES (mk) GAUGE PHOSPHOR MANGANIN COPPER BRONZE 6 wire length* RF COAX OPTIONS RF interfaces through the base or side window include 20 GHz semi-rigid cables with SMP connection ends. If the user wants to connect to a motion stage, these cables are adapted to short flexible tails. These tails allow motion but preserve the thermal and electrical performance of the semi-rigid link. GAS TUBE CONNECTIONS Both the Cryostation and Nanoscale Workstation allow the introduction of gas to their experiments. The gas tube can be connected to a small user sample environment, or just have the open end deposit a few molecules of gas onto the sample. The tube can be thermally lagged to minimize heat paths near the sample and is usually coiled inside the sample space to facilitate final uses. 10 wire length* wire length** PLATFORM TEMPERATURE RISE FOR COAX (mk) Using 20 GHz semi-rigid coax lagged at the radiation shield followed by a short piece of 5 GHz flexible coax to sample results in a 25 mk rise per cable. Other options exist depending on your application, base temperature, number of coax required, and bandwidth required. Contact your sales representative for more information. *Calculation based on wire being thermally connected to the 1st stage at approximately 50% of overall wire length. **Long wire lengths can be difficult to install properly. 21

22 SAMPLE MOUNTING SAMPLE MOUNTING OPTIONS Specially designed for various applications and configurations STANDARD GENERAL PURPOSE DAMPED SAMPLE MOUNT Provides an easily configurable way to position samples at various distances and angles with respect to the side and top optical ports. STOCK DESIGN SIMPLE SAMPLE MOUNTS Sized specifically to work with castles, magnets, or other special configurations. Examples: CUSTOM SAMPLE MOUNTS Designed to fit unique experimental requirements, including a family of electrical, piezo based, and adjustable mounts. Examples: STANDARD ADJUSTABLE TALL RECTANGULAR CASTLE MAGNETO- OPTIC FLANGE CUSTOM Z ADJUSTABLE Contact the engineers at Montana Instruments for help choosing the appropriate mount for your needs. ELECTRICAL SAMPLE MOUNT OPTIONS Seamlessly integrated for optimal thermal performance MO14 CB12 DIP16 The Cryostation connects 29 low frequency lines to interface sockets inside of the cold space. Montana Instruments provides three styles of Electrical Sample Mounts that allow the user to pre-mount samples on small chips or circuit boards to easily make electrical connections. This option is useful for those who want to simply change out the samples, and for those who require electrical connections. The ESM options work best with 50mm windows. The CB12 uses a small circuit board with 12 post connections to similarly provide convenient electrical contacts to the mounted sample. Samples are thermally mounted to the central post, then wire bonded to the surrounding pads. The DIP16 electrical sample mount is designed to hold standard DIP16 chip carriers with the sample mounted in the carrier and wire bonded to the chip contact pins. The pins of the chip slide into a row of sockets which are electrically connected to the feedthroughs. The MO14 has 14 connections on a small circuit board designed to mount in the Magneto-Optical system. It allows for easy exchange of the sample board with wires on the mounting post. Once the sample is mounted and electrically connected, the sample pad may be permanently fastened to the electrical contact board. Small flexible cable sets are available from Montana Instruments to simplify your sample wiring. 22

23 OPTIONAL CONFIGURATIONS INTERFACE EXTENSION HOUSING The Cryostation can be configured to add signal interfaces above the lower housing by using a 25mm spacer with four user specified side panels. This option provides more room to the sample space and is useful when the user wants to easily add or remove RF and fiber connections. HOSE OPTIONS Some users want to separate the compressor further from the cryostat and optical table. Options are available for 30 hoses and cables to accommodate this. This does not affect system performance. CABLE HARNESSES Often users want to connect from the cold space connection sockets to their equipment. We offer simple cable bundles with 2, 3, 4, or 5 wires for this purpose. The cables are generally provided with a straight section for thermal lagging and a coiled section for thermal spacing and are made from low conduction materials. See our Wiring Guide on page 23 for help in choosing wire for your experiment. EXTENDED HOUSING OPTION The standard Cryostation has the sample chamber center approximately 80mm from the cryocooler tube. The extended option moves the sample chamber out 120mm more than the standard chamber and includes a base plate for rigidity. The extended option allows for better overhead access or the option to interface with larger optical equipment. 23

24 USA HQ Our mission is to make the researcher more effective. Our technology takes care of the cryogenics so researchers can focus on results. 151 Evergreen Drive, Bozeman, MT 59715, USA TEL FAX TOLL FREE For more information on Montana Instruments products and technologies, please contact your local representative. For a complete list of distribution, sales and service centers please visit: