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					    HARPS-NEF
ELECTRICAL SYSTEMS

    Tom Gauron




       HARPS-NEF PDR         1
      December 6 & 7, 2007
                        HARPS-NEF
                       ELECTRICAL SYSTEMS




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




                            HARPS-NEF PDR         2
                           December 6 & 7, 2007
              Figure 1 – System Function Diagram




HARPS-NEF
 ELECTRICAL
  SYSTEMS



                        HARPS-NEF PDR              3
                       December 6 & 7, 2007
                               HARPS-NEF
                              ELECTRICAL SYSTEMS

                                 Detectors
Requirements                          Capability
Science camera.                           Spectrograph Science camera and
                                          preamps

Science camera control/readout            Science camera electronics located in
electronics.                              detector rack.

Science camera exposure control.          Bi-stable shutter controlled by RS-232
                                          or discrete outputs (Uniblitz)

Monitor science camera exposure.          PMT assembly in spectrograph read
                                          out by Agilent pulse counters in control
                                          rack.
Control and data interface to science     Science camera control and data
camera.                                   acquisition uses commercial fiber
                                          interface board in Devices CPU (EDT).
                                    HARPS-NEF PDR                                 4
                                   December 6 & 7, 2007
                                HARPS-NEF
                               ELECTRICAL SYSTEMS

                                  Detectors
Requirements                                Capability
Guide camera.                               Guide camera located in Front End
                                            Assembly.

Guide camera control/readout                Guide camera electronics located in
electronics.                                Front End Assembly electronics box.

Control and data interface to guide         Guide camera control and data
camera.                                     acquisition uses custom fiber interface
                                            board in Devices CPU.




                                       HARPS-NEF PDR                                  5
                                      December 6 & 7, 2007
                                HARPS-NEF
                              ELECTRICAL SYSTEMS


           Temperature Control & Monitoring
Requirements              Capability
Electronics rack heat extraction.          Heat exchangers in each rack utilizing
                                           facility coolant.


Science detector temperature control.      Lakeshore controller closing
                                           temperature loop on detectors using
                                           LN2 and closed loop heaters.

Guide detector temperature control.        Guide CCD cooled by TEC.



Monitor temperatures – non critical.       Dallas DS18S20 1-WireTM digital
                                           temperature sensors used for routine
                                           temperature monitoring.
                                     HARPS-NEF PDR                                  6
                                    December 6 & 7, 2007
                                  HARPS-NEF
                              ELECTRICAL SYSTEMS


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




                                    HARPS-NEF PDR                              7
                                   December 6 & 7, 2007
                             HARPS-NEF
                            ELECTRICAL SYSTEMS

                    Power Control & Conditioning
Requirement                       Capability
Facility AC power frequency and          Continuous conversion type UPS used
voltage conversion.                      to convert facility 250V/50Hz to
                                         120VAC/60Hz. Located in auxiliary
                                         room

AC power control.                        Ethernet controlled AC power
                                         switching provided in control rack
                                         (Pulizzi).

DC power control.                        Solid state relays used in electronics
                                         assemblies to control local DC power
                                         using control I/O.




                                   HARPS-NEF PDR                                  8
                                  December 6 & 7, 2007
                                 HARPS-NEF
                               ELECTRICAL SYSTEMS

                     Power Control & Conditioning
Requirement                        Capability
UPS                                         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




                                      HARPS-NEF PDR                                  9
                                     December 6 & 7, 2007
                                 HARPS-NEF
                                ELECTRICAL SYSTEMS


                                Motion Control
Requirements                           Capability
Provide remote controlled positioning       Calibration fibers select source under
of calibration fibers in calibration box    Local Control Unit step motor control
for source selection.                       using IMS Mforce step motor
                                            controller/drivers. Interfaced by RS-
                                            485, via Ethernet.
Remote controlled positioning of optics Mforce step motor controllers, located
and related hardware in Front End       in Front End electronics assembly
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.



                                      HARPS-NEF PDR                              10
                                     December 6 & 7, 2007
                                 HARPS-NEF
                                ELECTRICAL SYSTEMS


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




                                      HARPS-NEF PDR                               11
                                     December 6 & 7, 2007
                                  HARPS-NEF
                               ELECTRICAL SYSTEMS


                                  Calibration
Requirements                            Capability
Provide calibration source with            Calibration box with HCL/incan light
multiple, selectable, sources.             sources in control rack. Two cal. fibers
                                           select source under Local Control Unit
                                           step motor control.

Fiber illuminator for use with external    Provided in calibration box assembly.
light source.


Focal plane illuminator.                   Focal plane illuminator provided in
                                           Front End. Controlled by discrete I/O.




                                     HARPS-NEF PDR                               12
                                    December 6 & 7, 2007
                                 HARPS-NEF
                             ELECTRICAL SYSTEMS


            Communication & Data Handling
Requirements –            Capability
Provide user and data handling           Rack mounted computers provided in
computers.                               control rack: Devices, User, and
                                         Spare.
Provide network support.                 Gig-E network switches in racks.
                                         Ethernet switch module in HCFA.

Provide RS-232 control channels for      Used for interfacing to COTS control
measurement and control devices.         hardware.


KVM support for remote CPU               KVM switch and Ethernet interface
interface.                               provided in control rack.



                                   HARPS-NEF PDR                                13
                                  December 6 & 7, 2007
                             HARPS-NEF
                            ELECTRICAL SYSTEMS


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




                                    HARPS-NEF PDR                           14
                                   December 6 & 7, 2007
                              HARPS-NEF
                            ELECTRICAL SYSTEMS


• 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




                                     HARPS-NEF PDR                          15
                                    December 6 & 7, 2007
HARPS-NEF
 ELECTRICAL
  SYSTEMS     Figure 2 – System Layout




                                   HARPS-NEF PDR         16
                                  December 6 & 7, 2007
                                 HARPS-NEF
                                ELECTRICAL SYSTEMS


• 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.




                                      HARPS-NEF PDR                       17
                                     December 6 & 7, 2007
             HARPS-NEF
            ELECTRICAL SYSTEMS




EDT - Science Camera Data Interface Hardware


                 HARPS-NEF PDR                 18
                December 6 & 7, 2007
                         HARPS-NEF
                        ELECTRICAL SYSTEMS


• 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.

                             HARPS-NEF PDR                             19
                            December 6 & 7, 2007
           HARPS-NEF
          ELECTRICAL SYSTEMS




Lakeshore – Model 325 - HTE3 Temperature Controller




               HARPS-NEF PDR                          20
              December 6 & 7, 2007
                  HARPS-NEF
                 ELECTRICAL SYSTEMS




Lakeshore – Model 218 – HTE1 & HTE2 Temperature Monitor




                      HARPS-NEF PDR                       21
                     December 6 & 7, 2007
                          HARPS-NEF
                         ELECTRICAL SYSTEMS



• 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




                              HARPS-NEF PDR                          22
                             December 6 & 7, 2007
 HARPS-NEF
ELECTRICAL SYSTEMS




UPS – DRC 3000TR




Pulizzi – IPC3400-NET


     HARPS-NEF PDR         23
    December 6 & 7, 2007
               HARPS-NEF
             ELECTRICAL SYSTEMS




                                Phoenix Contact
                                TRABTECH Protection Devices




Schaffner Line Filter




                   HARPS-NEF PDR                         24
                  December 6 & 7, 2007
                          HARPS-NEF
                        ELECTRICAL SYSTEMS



• 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




                              HARPS-NEF PDR                           25
                             December 6 & 7, 2007
                 HARPS-NEF
               ELECTRICAL SYSTEMS




IMS – Mforce Step Motor Controller/Driver




                     HARPS-NEF PDR          26
                    December 6 & 7, 2007
 HARPS-NEF
ELECTRICAL SYSTEMS




     HARPS-NEF PDR         27
    December 6 & 7, 2007
                        HARPS-NEF
                       ELECTRICAL SYSTEMS


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




                            HARPS-NEF PDR                                28
                           December 6 & 7, 2007
HARPS-NEF
 ELECTRICAL   Figure 3 - Calibration Box Diagram
  SYSTEMS




                              HARPS-NEF PDR         29
                             December 6 & 7, 2007
                           Figure 4
                       LCU Box Diagram




 HARPS-NEF PDR                      30
December 6 & 7, 2007
                               HARPS-NEF
                              ELECTRICAL SYSTEMS




S&J Juniper - Standard Pattern HCL            EMCO – HC20 HCL Power Supply




   Gilway – Typical Halogen Lamps                Acopian – Typical Halogen LVPS


                                      HARPS-NEF PDR                           31
                                     December 6 & 7, 2007
                             HARPS-NEF
                            ELECTRICAL SYSTEMS



• 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-WireTM interfaces as well
         as discrete control functions, TBD




                                 HARPS-NEF PDR                               32
                                December 6 & 7, 2007
                    HARPS-NEF
                   ELECTRICAL SYSTEMS




ADVANTECH – ADAM-4570 Serial Server




                         Gumstix – Verdex XL60 Motherboard

                        HARPS-NEF PDR                        33
                       December 6 & 7, 2007
                          HARPS-NEF
                         ELECTRICAL SYSTEMS



• 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




                              HARPS-NEF PDR                     34
                             December 6 & 7, 2007
                         HARPS-NEF
                       ELECTRICAL SYSTEMS



• 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-WireTM temperature sensors
         – Focal plane illuminator LED


                            HARPS-NEF PDR                35
                           December 6 & 7, 2007
HARPS-NEF
 ELECTRICAL   Figure 5 - Front End Block Diagram
  SYSTEMS




                     HARPS-NEF PDR                 36
                    December 6 & 7, 2007
                             HARPS-NEF
                            ELECTRICAL SYSTEMS


• 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-WireTM interface to temperature sensors in HCFA and e-box
             – Discrete I/O for control functions




                                 HARPS-NEF PDR                               37
                                December 6 & 7, 2007
HARPS-NEF
 ELECTRICAL   Figure 6 - Front End E-Box Block Diagram
  SYSTEMS




                       HARPS-NEF PDR                     38
                      December 6 & 7, 2007
HARPS-NEF
 ELECTRICAL                            Figure 7
  SYSTEMS             Front End E-Box Packaging Diagram View-A


                                                        PI E71 Tip/Tilt
                                                        PZT Controller




      Mforce Drives




        Guider
        E-box

                 Gumstix
                 Assy.

                                  HARPS-NEF PDR                           39
                                 December 6 & 7, 2007
HARPS-NEF
 ELECTRICAL
  SYSTEMS                                Figure 8
                        Front End E-Box Packaging Diagram View-B




                                                            Power Supplies

     AC Power
     Filter/Protector




                   Ethernet           Gumstix
                   Switch             Assy.
                                      HARPS-NEF PDR                          40
                                     December 6 & 7, 2007
                          HARPS-NEF
                      ELECTRICAL SYSTEMS


• Auxiliary Room Electronics Racks
  – Detector Rack
  – Control Rack
  – Vacuum Control Rack




                           HARPS-NEF PDR         41
                          December 6 & 7, 2007
       HARPS-NEF
     ELECTRICAL SYSTEMS




   Control and Detector Rack
EIC Sealed 19” Electronics Rack

           HARPS-NEF PDR          42
          December 6 & 7, 2007
                           HARPS-NEF
                          ELECTRICAL SYSTEMS



• 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




                               HARPS-NEF PDR         43
                              December 6 & 7, 2007
                            HARPS-NEF
                          ELECTRICAL SYSTEMS




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




                                HARPS-NEF PDR                           44
                               December 6 & 7, 2007
                             HARPS-NEF
                           ELECTRICAL SYSTEMS


• 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

                                 HARPS-NEF PDR                  45
                                December 6 & 7, 2007
                              HARPS-NEF
                             ELECTRICAL SYSTEMS



• 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




                                  HARPS-NEF PDR           46
                                 December 6 & 7, 2007
          HARPS-NEF
        ELECTRICAL SYSTEMS




Hamamatsu H6240-01 Photon Counting Head




   Agilent 53132A Frequency Counter


              HARPS-NEF PDR               47
             December 6 & 7, 2007
                       HARPS-NEF
                      ELECTRICAL SYSTEMS




• Vacuum Systems Rack
  – Provided by OG
  – Vacuum Control
  – Spectrograph Temperature




                          HARPS-NEF PDR         48
                         December 6 & 7, 2007
HARPS-NEF
 ELECTRICAL
  SYSTEMS                Power Summary (estimate)
                                                   Peak            Avg.
                                                 Power (W)       Power (W)
  Control Rack                                         460             214
  Detector Rack                                         411            302
  Vacuum Control Rack                                  200              70
  Front End                                            100              10
  Front End E-Box                                      165             116
  Aux. Room Miscellaneous                             2000            1000
  HTE1 Thermal Control                                5280            2640
  HTE2 Thermal Control                                2100            1100
  HTE3 Thermal Control                                       ?           ?
                                      Total          10716           5452
                               HARPS-NEF PDR                            49
                              December 6 & 7, 2007

				
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