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Contents
Contents
TJNAF
Hall A Experimental Equipment
Operations Manual and Safety Assessment
Info Level 4
The Hall A Collaboration
Editor:
E. A. Chudakov
0
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1
Contents
List of Tables
List of Figures
Introduction
General
The Personnel Safety System
Restricted Access
Sweep
Controlled Access
RF Power Permit
Beam Permit
Run Safe Boxes
Hall A Access
Controlled Access Procedure
Restricted Access Procedure
Access Requirements
The Hall A Safety Walk-through
Beamline
General Description
Introduction
Authorized Personnel
Additional Safety Information
Machine/Beamline protection system
Personnel Safety System
Beam Position Monitors
Beam Current Measurement
System Layout
Authorized Personnel
Arc Energy Measurement
Computers and softwares used by scanners and integral:
Summary of ARC operations:
Preliminary details about MEDM
Details on pulser check
Details on HV check
Details on EPICS check (scanners)
Details on ioc reboot (scanners)
Details on disk space check (scanners)
Details on running a scan
Details on MEDM window print
Details on profile plot
Details on gain adjustment (scanners)
Details on file save (scanners)
Details on trip handling
Detail on encoder change (scanner)
Detail on encoder re-mount (scanner)
De tails on scanner expert task
Detail on theodolite survey of a bench
More on the theodolite menu
Summary of field integral
Shed access and safety
Details on integral system check
Details on NMR lock
Details on integral run
Details on integral error
Details on integral data save
Integral ioc reboot
Details on temperatures
Details on AC power (integral)
Details on mechanics (integral)
Details on detailed field mapping
Fast Raster
Target Chamber
Target Chamber - Spectrometer Coupling
Stress Analysis of the Middle Ring
Vacuum Pumping System
Bremsstrahlung Radiator
Overview
Safety Issues
Operations
Special Instructions
Møller Polarimeter
Purpose and Layout
Principles of Operation
Description of Components
MEDM Control
Polarized Electron Target
Spectrometer Description
Detector
Electronics
DAQ
Slow Control
Operating Procedure
Initialization
Initial Beam Tune
The Magnet Settings
Final Beam Tune
Target Motion
Detector Tuning and Checking
Polarization Measurement
Safety Assessment
Magnets
Vacuum System
High Voltage
Target
List of Authorized Personnel
Compton Polarimeter
Targets
Overview
Cryogenic Hydrogen and Deuterium Targets
Flammable Gas
Electrical Installation
Flammable Gas Detectors
Pressure
Target Cells
Pressure Relief
Scattering Chamber Vacuum Failure
Temperature Regulation
Target Freezing
ODH
Controls
Authorized Personnel
The Waterfall Target
The hydraulic system
The gas system
The movement system
The slow-control system
Authorized Personnel
Safety Assessments
Operating procedure
Troubleshooting
Polarized
3
He Target
High Resolution Spectrometers (HRS)
Overview
Safety with Regards to the Spectrometer
Hall A Vacuum System
Spectrometer Vacuum System
Target Vacuum System
Magnet Vacuum System
Beam Line Vacuum System
Beam Exit Vacuum System
Hazards of Vacuum Systems
The High Resolution Spectrometer (HRS)
Magnets and Power Supplies
Personnel
Quadrupole Magnets
Cryogenic Procedures
First Time Startup Check List.
Dipole Magnet
Operation of the HRS Magnets
Field Monitoring
Simple Spectrometer Field Setting (Autopilot Mode)
Dipole Field Monitoring Electron Arm
Authorized Personnel
NMR Operating Procedure:
Powering Up Dipole Magnets:
Starting Q1 Power Supply:
Starting Q2/3 Power Supply:
Collimators and Sieve Slits
Authorized Personnel
Safety Assessment
Operating Procedure
Spectrometer Alignment
Personnel Responsible
HRS Detectors
Overview
Geometry of the Spectrometer Detector Packages
Vertical Drift Chambers
Overview
Operating Procedure
Handling Considerations
Other Documentation
Safety Assessment
Responsible Personnel
Trigger Scintillator Counters
Overview
PMT regime and time resolution
PMT operation monitoring
PMT replacement
2" PMT Bases for S1 and S2 Trigger Counters
Handling Considerations
5" PMT Bases for S3 Counters
Safety Assessment
Responsible Personnel
Lead Glass Shower Counters
Overview
Operating Procedures
Handling Considerations
Safety Assessment
Authorized Personnel
Software Algorithms
Aerogel CherenkovCounter
Overview
Responsible Personnel
Safety Assessment
Operating Procedure
Handling Considerations
The Focal Plane Polarimeter
Overview
Operating Procedure
Carbon Doors
Handling Considerations
Safety Assessment
Responsible Personnel
The Hall A Gas System
Overview
Gas Alarms
HRS Gas Supply System for Wire Detectors
Overview
Bulk Gas Supply
Gas Mixing Station
Mass Flow Control System
Alcohol Bubbler
Delivery Pressure Control
Gas Delivery into Hall A
Distribution in the Shield Houses
Waste Gas Collection and Venting
Autherized Personnel
Safety and Device Protection
System Operation
Pre-Startup Checklist
Startup Procedure
Normal Operation
Changing gas bottles
Adding Alcohol
Setting a Flow Rate
Troubleshooting : Things to Check
Resetting a closed Excess Flow Valve
Restarting flow after a power failure.
Maintenance
Periodic Inspections
Slow Controls
Hall A Slow Controls
Introduction
Hall A Controls Overview
Personnel Responsible
Data Acquisition and Trigger
Spectrometer Data Acquisition
General Computer Information
Beginning of Experiment Checkout
Running CODA
Some Frequently Asked Questions about DAQ
Cold Start of CODA
Electronic Logbook and Beam Accounting
Terminal Servers
Trigger Hardware and Software
Online Analysis, Data Checks
Scaler Display and Scaler Events
Analysis using ESPACE
Dataspy and Dhist
Hall Checklist
Pre Beam and Cryo Target Checklist
Post Beam Checklist for Maintenance Period
Post Beam Checklist for an Extended Time
Bibliography
About this document ...
Eugene Chudakov 2003-06-06
