HALL B Polarized Target Status Report
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anuary 25, 2000Timetable
January
1. Re-cable test cryostat
2. Construct new heat exchanger
3. Re-cable heat exchanger
4. Construct new vapor shielded transfer line
5. Order LHe
February
1. Install refrigerator in test cryostat
2. Pump-down, leak check
3. Begin tests on or about Feb. 1
February, part 2
1. Analyze results of Feb. tests, modify refirgerator as needed
2. Complet e new design of vacuum pumping system
3. Assemble microwave system begin tests
4. Finalize software requirements
5. Purchase 2nd ITC502 for polarized target
March
1. Begin work on control and NMR software
2. Stepper motor control/readback for valves, etc
3. Modify LHe transfer line for use with service module
4. Write RS232 drivers for EPICS controls
5. Complete modifications to target stick and brass heatsink
6. Work on NMR circuitry (temperature stabilization, noise reduction)
7. Finalize mini-cup design and construction
8. TSOP for magnet operation in EEL
April
1. Re-cable polarized target cryostat
2. Modify EG1 EPICS controls database for operation in EEL
3. Install ‘fridge, button-up cryostat
May
1. Leak check cryosts and pumping lines
2. Round up usual suspect, begin cool down and polarization tests
May, June, July
1. Repairs/Modifications in EEL
2. Additional tests?
3. Disassembly in EEL
August
1. Transport to Hall B, reassemble
2. Cool down magnet, refrigerator
3. Begin TE measurements
HALL B Polarized Target Computer Controls
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anuary 25, 2000LABVIEW
An updated version of the UVa NMR code will:
1. Control/monitor the superconductiong magnet
2. Monitor refrigerator temperatures via ITC503 (3 sensors)
3. Monitor MKS baratrons for 3He/4He vapor pressure thermometry
4. Control annealing sensors and heaters
5. Control/monitor microwave power
6. RF frequency modulation
7. NMR scans
For this purpose a dedicated PC running Win95 or Linux will be in the
counting house and a 2nd PC or X-terminal will be in the Hall.
EPICS
An updated version of the EG1 control software will:
1. Control buffer dewar and service module LHe levels
2. Control banjo LHe level
3. Control separator and transfer line flow rates
4. Monitor cryostat temperatures via ITC501
5. Monitor refrigerator temperatures via AVS bridge and ITC502
6. Control target motion
7. Control all pumps, monitor all pressures
The existing IOC will be used for all EPICS controls. It will boot from the Accelerator Division’s hard disk. For monitoring and controlling the GUI interface, an X-terminal or PC running Linux will be located in the counting
and an X-terminal will be available in the Hall.
Note: Integration of LabView and EPICS controls may be possible (facilitated
by LabView for Linux. A single LabView/EPICS computor (Linux) may be sufficient.