Difference between revisions of "Solenoid Ramping Shift"

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(Ramping the Magnet)
(Ramping the Magnet)
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'''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.
 
'''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.
 
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[[Image:Solenoid vacuum status.png | thumb | 551px | Fig. 1. Solenoid vacuum status screen]]
[[Image:Solenoid vacuum status.png | thumb | 316px | Fig. 1. ]]
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* Setup
 
* Setup
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*#* Click on “Plot All Forces” button (Graph for 4 coils should be displayed)
 
*#* Click on “Plot All Forces” button (Graph for 4 coils should be displayed)
 
*#* Close strain gauge window
 
*#* 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;
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*# Ensure all is green on the “Vacuum Status” window and pumps are at 100% or better. The screen should look like in Fig. 1.
  
 
== When the Solenoid Trips ==
 
== When the Solenoid Trips ==

Revision as of 16:29, 25 March 2015


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.

Fig. 1. Solenoid vacuum status screen
  • Setup
    1. 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
    2. 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
    3. 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
    4. Ensure all is green on the “Vacuum Status” window and pumps are at 100% or better. The screen should look like in Fig. 1.

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.

Table: Expert personnel for the Solenoid Magnet
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

Expert Information