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	Source	Title
SPE-I-G0074	IGPO	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

5.1.1.1 Mechanism Interface

5.1.1.2 Scan Tool

5.1.1.3 Cycle Tool

5.1.1.4 Position Tool

5.1.2 Calibration Procedure

5.2 Daytime Calibration on the Telescope

5.2.1 Calibration with GCAL

5.2.1.1 Spectral Calibration

5.2.1.2 Flexure Testing

5.2.2 Calibration with ALTAIR

5.2.2.1 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

6.1.2.1 Environmental Cover

6.1.2.2 ISS Interface Plate

6.1.2.3 Thermal Enclosures

6.1.3 Packing the Components

6.1.3.1 ISS Interface Plate

6.1.3.2 Cryostat

6.1.3.3 Integration Frame

6.1.3.4 Ballast and other Heavy Components

6.1.3.5 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

6.2.3.1 Preparation, Service Tooling

6.2.3.2 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

7.1.2.1 Dismantling the Vacuum Jacket

7.1.2.2 Access through the Radiation Shields

7.1.2.3 Spectrograph Focal Plane Unit

7.1.2.4 OIWFS

7.1.2.5 Cryocoolers

7.1.3 Access to Spectrograph

7.1.3.1 Dismantling the Vacuum Jacket

7.1.3.2 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

7.6.6.1 Detector Support Tower

7.6.6.2 Baffling

7.6.6.3 Camera

7.6.6.4 Flip Mirror

7.6.6.5 Grating Turret and Grating Drive

7.6.6.6 Collimator Corrector Tower

7.6.6.7 Tri-Fold Tower

7.6.6.8 Collimator Mirror Tower

7.6.6.9 Image Slicer Tower

7.6.6.10 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

7.8.1.1 Filter-Fold Tower

7.8.1.2 Image Slicer Tower

7.8.1.3 Tri-Fold Tower

7.8.1.4 Grating Turret

7.8.2 System Alignment

7.8.2.1 Focal Converter

7.8.2.2 Cold Stop

7.8.2.3 First and Second Fold Mirrors

7.8.2.4 Image Slicer Tower

7.8.2.5 Collimator Mirror Tower

7.8.2.6 Collimator Corrector Tower

7.8.2.7 Gratings

7.8.2.8 Camera Focus

7.8.2.9 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

8.1.2.1 MVME 167-33B Single Board Computer

8.1.2.2 BC635VME Time Bus Interface

8.1.2.3 MVME 761-001 Transition Module

8.1.2.4 XVME 490-1 Serial Port Card

8.1.2.5 XVME-240 Digital I/O Card

8.1.2.6 VME8-8 Stepper Motor Controller

8.1.2.7 Sensor Support Board

8.1.2.8 XVME-566 Analog Input Card

8.1.2.9 Cooling Crate and Power Supply

8.1.3 Phytron Backplane

8.1.4 Phytron Stepper Motor Driver Modules

8.1.5 Thermal Control

8.1.5.1 Omega Temperature Controllers

8.1.5.2 Omega Digital Thermometer

8.1.5.3 Pacific Scientific Stepper Drivers

8.1.5.4 Backup Pulse Generator Card

8.1.5.5 Timer and Interlock Subsystem

8.1.5.6 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

8.2.2.1 MVM5100 Single Board Computer

8.2.2.2 BC635VME Time Bus Interface

8.2.2.3 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	figure.gif

Appendix B: Test Data for Optical Components

Appendix C: Spectrograph Detector Test Data

Appendix D: Alignment History

Appendix E: Calibration History