HARPS-NEF ELECTRICAL SYSTEMS. Tom Gauron

Transcription

1 Tom Gauron 1

2 Electrical Systems Functional Blocks System Physical Layout Subsystem Detail Front End Physical Layout Auxiliary Room Electronics Racks Power Summary 2

3 Figure 1 System Function Diagram HARPS-NEF ELECTRICAL SYSTEMS 3

4 Requirements Science camera. Science camera control/readout electronics. Detectors Capability Spectrograph Science camera and preamps Science camera electronics located in detector rack. Science camera exposure control. Monitor science camera exposure. Control and data interface to science camera. Bi-stable shutter controlled by RS-232 or discrete outputs (Uniblitz) PMT assembly in spectrograph read out by Agilent pulse counters in control rack. Science camera control and data acquisition uses commercial fiber interface board in Devices CPU (EDT). 4

5 Requirements Guide camera. Guide camera control/readout electronics. HARPS-NEF Detectors Capability Guide camera located in Front End Assembly. Guide camera electronics located in Front End Assembly electronics box. Control and data interface to guide camera. Guide camera control and data acquisition uses custom fiber interface board in Devices CPU. 5

6 Requirements Electronics rack heat extraction. Temperature Control & Monitoring Capability Heat exchangers in each rack utilizing facility coolant. Science detector temperature control. Guide detector temperature control. Lakeshore controller closing temperature loop on detectors using LN2 and closed loop heaters. Guide CCD cooled by TEC. Monitor temperatures non critical. Dallas DS18S20 1-Wire TM digital temperature sensors used for routine temperature monitoring. 6

7 Requirements Monitor temperatures critical. Temperature Control & Monitoring Capability Lakeshore temperature monitors used with RTD s to monitor critical thermal zones. Control HTE1 to 18 ± 1.5C Control HTE2 to 15 ± 0.2C Control HTE3 to 17 ± 0.01C Heat Pump provided. Heat exchanger and chiller Closed loop heater controlled by Lakeshore temperature controller. 7

8 Requirement Facility AC power frequency and voltage conversion. HARPS-NEF Power Control & Conditioning Capability Continuous conversion type UPS used to convert facility 250V/50Hz to 120VAC/60Hz. Located in auxiliary room AC power control. DC power control. Ethernet controlled AC power switching provided in control rack (Pulizzi). Solid state relays used in electronics assemblies to control local DC power using control I/O. 8

9 Requirement UPS Power Control & Conditioning Capability Conversion UPS and local UPS units located in detector and control racks. Transient protection and filtering AC power filters, transient, and overcurrent protection devices located in control rack 9

10 Requirements Provide remote controlled positioning of calibration fibers in calibration box for source selection. Remote controlled positioning of optics and related hardware in Front End Assembly. Motion Control Capability Calibration fibers select source under Local Control Unit step motor control using IMS Mforce step motor controller/drivers. Interfaced by RS- 485, via Ethernet. Mforce step motor controllers, located in Front End electronics assembly used for controlling and driving step motors on optics positioning mechanisms. Position feedback using rotary encoders. End of travel or home switches provided, as required. 10

11 Requirements Provide continuous tip/tilt control of mirror assembly. Motion Control Capability Physik Instrumente PZT tip/tilt actuator and control/drive electronics located in Front End assembly and electronics box. RS-232 interface, via Ethernet. 11

12 Requirements Provide calibration source with multiple, selectable, sources. Calibration Capability Calibration box with HCL/incan light sources in control rack. Two cal. fibers select source under Local Control Unit step motor control. Fiber illuminator for use with external light source. Provided in calibration box assembly. Focal plane illuminator. Focal plane illuminator provided in Front End. Controlled by discrete I/O. 12

13 Requirements Communication & Data Handling Capability Provide user and data handling computers. Provide network support. Provide RS-232 control channels for measurement and control devices. Rack mounted computers provided in control rack: Devices, User, and Spare. Gig-E network switches in racks. Ethernet switch module in HCFA. Used for interfacing to COTS control hardware. KVM support for remote CPU interface. KVM switch and Ethernet interface provided in control rack. 13

14 Requirements 1-Wire TM network for temperature sensors. Communication & Data Handling Capability Provided using embedded computer and COTS 1-Wire TM interface device. 14

15 Physical Layout (Figure 2) SAO electrical subassemblies are located in two, liquid cooled, 19in racks in auxiliary room Vacuum control rack containing vacuum and spectrograph temperature controller is not liquid cooled. Science detector located in cryostat on spectrograph Shutter in fiber Scrambler Exposure meter in vacuum system Front End electrical box on telescope houses step motor drivers, piezoelectric control, guide detector electronics, and support functions Front End containing optics and associated mechanisms, including piezoelectric tip/tilt stage 15

16 ELECTRICAL SYSTEMS Figure 2 System Layout 16

17 Detectors Science Discussed in detail in detector section. Science camera E2V 4k x 4k CCD and preamps located on spectrograph Science camera electronics located in detector rack Science camera EDT optical fiber data interface PWB located in devices computer in control rack Guider Discussed in detail in detector section. Guide camera E2V 2k x 2k CCD located in Front End Guide camera electronics based on Carnegie design located in Front End electronics box. Guide camera custom optical data interface PWB, based on Carnegie design, located in devices computer in control rack. 17

18 EDT - Science Camera Data Interface Hardware 18

19 Temperature Control & Monitoring Sensors Dallas DS18S20 precision 1-Wire digital interface for general purpose temperature readout. Used in racks and Front End. CCD temperature sensor, TBD, used for CCD temperature readout RTD sensors used for monitoring critical environment temperatures. Read out using Lakeshore Model 218 temperature meter Detector cold biased using controlled LN2 to CFC and servo controlled up to operational temperature using Lakeshore controller and heater resistors. HTE1 and HTE2 temperatures controlled using commercial air coolers. Spectrograph inner thermal environment (HTE3) actively heated to operating temperature. Controller: Lakeshore. 19

20 Lakeshore Model HTE3 Temperature Controller 20

21 Lakeshore Model 218 HTE1 & HTE2 Temperature Monitor 21

22 Power Control & Conditioning Conversion of facility 240VAC/50Hz to 120VAC/60Hz using conversion type UPS. (DRC 3000TR) AC power control via Ethernet using Pulizzi smart power controllers Transient protection and line filtering provided in racks and Front End electronics box. Line filtering provided 22

23 UPS DRC 3000TR Pulizzi IPC3400-NET 23

24 Phoenix Contact TRABTECH Protection Devices Schaffner Line Filter 24

25 Motion Control Step motors used for all conventional stages IMS MforcePlus2 step motor controller/drivers used for mechanism control. RS-485 multidrop interface Physik Instrumente LVPZT controller driver and stage used for mirror tip/tilt control. RS-232 interface 25

26 IMS Mforce Step Motor Controller/Driver 26

27 27

28 Calibration Hardware Calibration Box (Figure 3) Th-Ar lamps (3), Halogen lamp (1), fiber illuminator for external light source (1), two fibers on linear stages, positioned to select lamp or dark position Photodiode indication of lamp state ON/OFF Local Control Unit Calibration Box Support (Figure 4) Step motor controller for light source select stages High voltage power supplies for Th-Ar lamps Low voltage power supplies for halogen lamp 28

29 ELECTRICAL SYSTEMS Figure 3 - Calibration Box Diagram 29

30 Figure 4 LCU Box Diagram USB SPI RS-232 V/G 30

31 S&J Juniper - Standard Pattern HCL EMCO HC20 HCL Power Supply Gilway Typical Halogen Lamps Acopian Typical Halogen LVPS 31

32 Communications and Data Handling Ethernet switches WHT network switch HARPS-NEF local network switch KVM and KVM switch for remote CPU operation Ethernet to RS-232 conversion for interfacing to various controllers Embedded Gumstix computer with custom PWB for physical and electrical interface to hardware. Provides 1-Wire TM interfaces as well as discrete control functions, TBD 32

33 ADVANTECH ADAM-4570 Serial Server Gumstix Verdex XL60 Motherboard 33

34 Vacuum Systems & OG Provided Controllers Controller for vacuum pump Spectrograph thermal zone temperature readout and control Air temperature readout for HTE1-3. Heater control for HTE3 34

35 Front End Assembly Physical Layout (Figure 5) Mechanisms Fiber protector Calibration mirror assembly ADC Neutral Density Wheel Guide camera focus Mirror Tip/Tilt LVPZT mechanism Miscellaneous Guide camera Dallas DS18S20 1-Wire TM temperature sensors Focal plane illuminator LED 35

36 ELECTRICAL SYSTEMS Figure 5 - Front End Block Diagram 36

37 Front End Assembly (continued) Front End E-Box (Figures 6, 7 & 8) Step motor controller/drivers Physik Instrumente LVPZT Tip/Tilt controller/driver Power supplies Guide camera electronics assembly Gumstix Subassembly Embedded CPU Ethernet interface RS-232 interface to LVPZT controller/driver 1-Wire TM interface to temperature sensors in HCFA and e-box Discrete I/O for control functions 37

38 ELECTRICAL SYSTEMS Figure 6 - Front End E-Box Block Diagram 38

39 ELECTRICAL SYSTEMS Figure 7 Front End E-Box Packaging Diagram View-A PI E71 Tip/Tilt PZT Controller Mforce Drives Guider E-box Gumstix Assy. 39

40 ELECTRICAL SYSTEMS Figure 8 Front End E-Box Packaging Diagram View-B Power Supplies AC Power Filter/Protector Ethernet Switch Gumstix Assy. 40

41 Auxiliary Room Electronics Racks Detector Rack Control Rack Vacuum Control Rack HARPS-NEF 41

42 Control and Detector Rack EIC Sealed 19 Electronics Rack 42

43 Detector Rack SAO designed detector electronics Power supplies for detector electronics AC power control (see Control Rack) Communications (see Control Rack) Shutter control Detector temperature control Spectrograph temperature monitoring 43

44 Uniblitz BDS-25 Bi-stable Shutter Uniblitz VCM-D1 Shutter Driver Controller Unit 44

45 Control Rack Network Switches Described in detail in software section. WHT network switch HARPS-NEF network switch KVM and KVM Switch Ethernet to RS-232 converters AC Power Control and Conditioning Pulizzi Ethernet controlled power strips Rack UPS Transient protection Agilent PMT pulse counters for exposure meter 45

46 Control Rack (continued) Computers Described in detail in software section. Device Computer Guide Camera Electronics interface board Science Camera Electronics interface board User computer Spare computer 46

47 Hamamatsu H Photon Counting Head Agilent 53132A Frequency Counter 47

48 Vacuum Systems Rack Provided by OG Vacuum Control Spectrograph Temperature 48

49 ELECTRICAL SYSTEMS Power Summary (estimate) Peak Power (W) Avg. Power (W) Control Rack Detector Rack Vacuum Control Rack Front End Front End E-Box Aux. Room Miscellaneous HTE1 Thermal Control HTE2 Thermal Control HTE3 Thermal Control?? Total