Difference between revisions of "Solenoid Ramping Shift"
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* Setup | * Setup | ||
*# Pull up CSS Solenoid screens as follows: | *# Pull up CSS Solenoid screens as follows: | ||
− | *# Pull up Solenoid Control screen from CSS main screen - Magnet/Solenoid | + | *#* Pull up Solenoid Control screen from CSS main screen - Magnet/Solenoid |
− | *# Cryo System (from Solenoid Control screen) | + | *#* Cryo System (from Solenoid Control screen) |
− | *# Interlock | + | *#* Interlock |
− | *# Power Supply | + | *#* Power Supply |
− | *# Voltage Taps/PXI | + | *#* Voltage Taps/PXI |
− | *# Vacuum Pumps | + | *#* Vacuum Pumps |
− | *# Strain Gauges | + | *#* Strain Gauges |
*# From the “Voltage Taps/PXI fast DAQ screen, do the following; | *# From the “Voltage Taps/PXI fast DAQ screen, do the following; | ||
*#* Click on the “Plot all Pickup Coils” button to open a Voltage vs. Time graph | *#* Click on the “Plot all Pickup Coils” button to open a Voltage vs. Time graph |
Revision as of 16:12, 25 March 2015
Contents
Routine Operation
When powered with the maximum current of 1350 A, the solenoid generates a field close to 2 Tesla in the bore. The full inductance of the solenoid is about 26 H. As the superconducting solenoid is very complex system, the operation of such system requires considerable knowledge and experience. The commissioning, troubleshooting, tuning of ground fault and quench detectors, Power ON and OFF, change current will be conducted by authorized experts only.
The responsibilities of the shift workers include:
- Monitor the overall status of the solenoid: current, field, interlocks, voltages, cryogenic levels etc.
- Notify experts when anomalies happen.
- Ramp the magnet per request of run coordinator.
- Make log entries to the HDLOG and HDSOLENOID logbooks.
Ramping the Magnet
This procedure is to be used by shift operators after all the preliminary checks have been completed and approval to ramp has been given by the Solenoid system expert. It assumes the magnet is at 0A current.
- Setup
- Pull up CSS Solenoid screens as follows:
- Pull up Solenoid Control screen from CSS main screen - Magnet/Solenoid
- Cryo System (from Solenoid Control screen)
- Interlock
- Power Supply
- Voltage Taps/PXI
- Vacuum Pumps
- Strain Gauges
- From the “Voltage Taps/PXI fast DAQ screen, do the following;
- Click on the “Plot all Pickup Coils” button to open a Voltage vs. Time graph
- Ensure the PXI DAQ is running (if not click “Start PXI DAQ” button
- Click on “Start Recording ROOT File” button. Make sure “File Size” is increasing.
- Click on the “Current” box at the top to start a Current vs. Time graph
- On the “Solenoid Strain Gauges” window:
- Confirm magnet is at zero current. Click on the “Zero Strain Gauges” button (all strain gauges should read close to 0).
- Click on “Plot All Forces” button (Graph for 4 coils should be displayed)
- Close strain gauge window
- Ensure all is green on the “Vacuum Status” window and pumps are at 100% or better. The screen should look like this;
- Pull up CSS Solenoid screens as follows:
When the Solenoid Trips
- Call Mechanical On-Call (757-544-7258) every time when the power supply trips!
- DO NOT clear interlock status or attempt to change MPS state before the Solenoid On-Call responses!
- Make screen shots of Solenoid status and post them to the HDLOG and HDSOLENOID logbooks: Interlock, MPS, Voltage, Cryo, Vacuum, Strain Gauge.
Expert personnel
The individuals responsible for checking that the solenoid is ready to take data and setting its operating parameters are shown in following table. Problems with normal operation of the solenoid should be referred to those individuals and any changes to their settings must be approved by them. Additional experts may be trained by the system owner and their name and date added to this table.
Name | Extension | Cellphone | Pager | Date of qualification |
---|---|---|---|---|
Mechanical On-Call | 544-7258 | Nov 10, 2014 | ||
George Biallas - Solenoid | 269-7535 | 813-1179 | [1] | June 12, 2014 |
Yi Qiang - Solenoid/PXI | 269-7237 | 358-2146 | [2] | June 12, 2014 |
Mark Stevens - Power Supply | 269-6383 | 318-1576 | [3] | June 12, 2014 |
Scot Spiegel - MPS/Solenoid | 536-5900 | [4] | June 12, 2014 | |
Jonathan Creel - Cryogenics | 269-5925 | 869-8910 | [5] | June 12, 2014 |
Dave Butler - PLC | 329-2583 | 329-2583 | [6] | June 12, 2014 |
Carroll Jones - LCW | 876-1778 | 876-1778 | [7] | Nov 14, 2014 |