Service and Calibration Manual


Created: 22 January 2001

Last modified: 27 March 2001






Jan van Harmelen


Research School of Astronomy and Astrophysics

Institute of Advanced Studies

Australian National University


Revision History


Revision No.

Author &


Approval &



Revision 1

Jan van Harmelen

22 January 2001

Peter McGregor

23 February 2001

Draft Document Outline.









1 Purpose. 3

2 Applicable Documents. 3

3 Introduction. 3

4 Preparing NIFS for Use or Storage. 4

5 NIFS Calibration. 5

6 NIFS Major Assembly. 5

7 Cryostat 6

8 Thermal Cabinets. 9

9 Interconnections. 10

10 OIWFS Detector System.. 11

11 Spectrograph Detector System.. 12

Appendix A: List of Figures. 14

Appendix B: Test Data for Optical Components. 14

Appendix C: Spectrograph Detector Test Data. 14

Appendix D: Alignment History. 14

Appendix E: Calibration History. 14


 [Note: in the final document, the table of contents will be to third level]


1 Purpose


The purpose of this Service and Calibration Manual is describe the procedures used to service, maintain, and calibrate the operation of the Gemini Near-infrared Integral Field Spectrograph.


2 Applicable Documents


Document ID





Programmatic Requirements for Gemini Instrumentation Development



3 Introduction


Section 19.4.2 of the document “Programmatic Requirements for Gemini Instrumentation Development” states the requirements for the Service and Calibration Manual.


In short, it needs to provide the information necessary to guide service and maintenance of the instrument. To this end, a major part of the document is devoted to assembly and disassembly procedures, and to inspection, realignment, and calibration procedures. Photographs are used where appropriate to show procedures, and histories and results are included as indicators of normal operating parameters and as diagnostic tools.


4 Preparing NIFS for Use or Storage


4.1 Setting Up in Instrument Preparation Area


4.1.1 Transportation


4.1.2 Connection to Services


4.1.3 Vacuum


4.1.4 Cooldown


4.1.5 Functionality Tests


4.1.6 Communication Links Tests


4.2 Mounting on the Telescope


4.2.1 Transportation


4.2.2 Connection to Services


4.2.3 Functionality Tests


4.2.4 Communication Links Tests


4.2.5 Full System Tests


4.3 Removal from the Telescope


4.3.1 Warmup


4.3.2 Accelerated Warmup


4.3.3 Disconnection from Services


4.3.4 Transportation


4.4 Preparation for Storage


4.4.1 Warmup


4.4.2 Accelerated Warmup


4.4.3 Vacuum



5 NIFS Calibration


Astronomical calibration is described in the NIFS User’s Manual. Only Calibration for engineering purposes is described here.


5.1 Calibrating Mechanism Positions


5.1.1 Using the Tools Mechanism Interface Scan Tool Cycle Tool Position Tool


5.1.2 Calibration Procedure


5.2 Daytime Calibration on the Telescope


5.2.1 Calibration with GCAL Spectral Calibration Flexure Testing


5.2.2 Calibration with ALTAIR Flexure Testing



6 NIFS Major Assembly


6.1 Disassembly and Packing for Transportation


6.1.1 Preparation, Service Tooling


6.1.2 Removing the Cryostat from the Integration Frame Environmental Cover ISS Interface Plate Thermal Enclosures


6.1.3 Packing the Components ISS Interface Plate Cryostat Integration Frame Ballast and other Heavy Components Thermal Enclosures


6.2 Assembly after Transportation


6.2.1 Preparation, Service Tooling


6.2.2 Integrating the Complete Instrument


6.2.3 Instrument Balancing Preparation, Service Tooling Ballast Positioning, Ballast Map



7 Cryostat


7.1 Vacuum Jacket Disassembly


7.1.1 Preparation, Service Tooling


7.1.2 Access to OIWFS and Spectrograph Focal Plane Unit Dismantling the Vacuum Jacket Access through the Radiation Shields Spectrograph Focal Plane Unit OIWFS Cryocoolers


7.1.3 Access to Spectrograph  Dismantling the Vacuum Jacket Access through the Radiation Shields


7.2 Vacuum Jacket Assembly


7.2.1 Assembly Order


7.2.2 Check-List before Closure


7.2.3 Preparation for Vacuum Pumping


7.3 OIWFS Disassembly


The NIRI manual will be adopted for NIFS when available.


7.4 OIWFS Assembly


The NIRI manual will be adopted for NIFS when available.


7.5 OIWFS Alignment


The NIRI manual will be adopted for NIFS when available.


7.6 Spectrograph Disassembly


7.6.1 Preparation


7.6.2 Removing the Radiation Shields


7.6.3 Removing the Cover and Skirt


7.6.4 Removing the Detector Housing


7.6.5 Removing the Baffling


7.6.6 Removing the Modules Detector Support Tower Baffling Camera Flip Mirror Grating Turret and Grating Drive Collimator Corrector Tower Tri-Fold Tower Collimator Mirror Tower Image Slicer Tower Filter-Fold Tower


7.7 Spectrograph Assembly


7.7.1 Assembly Order


7.7.2 Check List before Closure


7.8 Spectrograph Alignment


7.8.1 Module pre-alignment Filter-Fold Tower Image Slicer Tower Tri-Fold Tower Grating Turret


7.8.2 System Alignment Focal Converter Cold Stop First and Second Fold Mirrors Image Slicer Tower Collimator Mirror Tower Collimator Corrector Tower Gratings Camera Focus Detector Rotation


7.8.3 Focus Checks


7.9 Electrical/Electronics Components


7.9.1 Hall Effect Sensors


7.9.2 Stepper Motors


7.9.3 Thermal Control


7.9.4 Wiring


Note: Detector wiring is covered under the detector systems



8 Thermal Enclosures


8.1 Optical Components Controller Thermal Enclosure


8.1.1 Introduction and Overview


For each sub section, give assembly and disassembly procedures, wiring diagrams, inspection procedures, performance curves, etc.


8.1.2 CC VME Rack MVME 167-33B Single Board Computer BC635VME Time Bus Interface MVME 761-001 Transition Module XVME 490-1 Serial Port Card XVME-240 Digital I/O Card VME8-8 Stepper Motor Controller Sensor Support Board XVME-566 Analog Input Card Cooling Crate and Power Supply


8.1.3 Phytron Backplane


8.1.4 Phytron Stepper Motor Driver Modules


8.1.5 Thermal Control Omega Temperature Controllers Omega Digital Thermometer Pacific Scientific Stepper Drivers Backup Pulse Generator Card Timer and Interlock Subsystem Power Supplies


8.1.6 Network Communications


8.1.7 Cabinet Wiring


8.2 Detector Controller Thermal Enclosure


8.2.1 Introduction and Overview


8.2.2 DC VME Rack MVM5100 Single Board Computer BC635VME Time Bus Interface Cooling Crate and Power Supply


8.2.3 Detector Temperature Controller


8.2.4 SDSU Power Supplies


8.2.5 Cabinet Wiring


8.3 Computer Systems Maintenance


The computer systems incorporated in the Thermal Cabinets are standard Gemini issue (except for the DC CPU board) and should be serviced according to Gemini procedures.


8.3.1 DC CPU Maintenance



9 Interconnections


9.1 Hoses


9.1.1 Helium Supply


9.1.2 Air Supply


9.1.3 Coolant Supply


9.2 Cables to Gemini Systems


9.2.1 Mains Power


9.2.2 Networks


9.2.3 Interlock System


9.3 Cables between Thermal Enclosures and Cryostat


9.3.1 Sensor Cables


9.3.2 Motor Cables


9.3.3 Temperature Controller Cables


9.3.4 Detector Controller Power Supply Cables


9.3.5 Communications Interconnects



10 OIWFS Detector System


10.1 Introduction


10.2 Connecting and Disconnecting the OIWFS Detector Controller from the Cryostat


10.2.1 Introduction


10.2.2 Dissipative Shorting Plugs


10.2.3 Disconnecting the Detector Controller From the Cryostat


10.2.4 Connecting the Detector Controller to the Cryostat


10.3 Assembling and Disassembling the OIWFS Detector and Detector Cryostat Wiring


10.3.1 Introduction


10.3.2 Dissipative Shorting Plugs


10.3.3 Removing Cryostat Wiring


10.3.4 Installing Cryostat Wiring


10.3.5 Removing Detector Housing from Cryostat


10.3.6 Installing Detector Housing In Cryostat


10.3.7 Removing Detector From Detector Mount Board


10.3.8 Installing Detector In Detector Mount Board


10.4 Configuring the SDSU Controller Boards


10.4.1 Introduction


10.4.2 Dual Channel Video Processor Board


10.4.3 Clock Driver Board


10.4.4 Timing Board


10.5 Assembling the OIWFS Detector Controller DSP Code


10.5.1 Introduction


10.5.2 Assembling Dual Channel Video Processor Board DSP Code



11 Spectrograph Detector System


11.1 Introduction


11.2 Connecting and Disconnection the Detector Controller From the Cryostat


11.3 Introduction


11.3.1 Dissipative Shorting Plugs


11.3.2 Disconnecting the Detector Controller From the Cryostat


11.3.3 Connecting the Detector Controller to the Cryostat


11.4 Assembling and Disassembling the Detector and Detector Cryostat Wiring


11.4.1 Introduction


11.4.2 Dissipative Shorting Plugs


11.4.3 Removing Flex Circuits


11.4.4 Installing Flex Circuits


11.4.5 Removing Detector Housing


11.4.6 Installing Detector Housing


11.4.7 Removing Detector from Detector Housing


11.4.8 Installing Detector in the Detector Housing


11.4.9 Removing Detector Mounting Board from Detector Housing


11.4.10 Installing Detector Mounting Board in the Detector Housing


11.5 Configuring the SDSU Controller Boards


11.5.1 Introduction


11.5.2 Quad Channel Coadder Video Processor Board


11.5.3 Clock Driver Board


11.5.4 Timing Board


11.5.5 Video Switch Board


11.6 Assembling the Detector Controller DSP Code


11.6.1 Introduction


11.6.2 Assembling VME Interface Board DSP Code


11.6.3 Assembling Timing/Coadder Video Processor Boards DSP Code


Appendix A: List of Figures


Figure 1





Appendix B: Test Data for Optical Components


Appendix C: Spectrograph Detector Test Data


Appendix D: Alignment History


Appendix E: Calibration History