Operation of the HRS Magnets

This is an abbreviated operating manual for the HRS superconducting magnets specifically designed for Hall A experimenters. It provides instructions for setting currents, invoking NMR field regulation and general system monitoring. Curious readers are directed to the references for more in-depth operating instructions and other technical manuals. Copies of the following supporting documents are available in the Hall A Control Room.

References
WANG NMR Dipole	Operation Manual Power Supply
Dynapower	User Manual
Appendix	NMR Tesla meter
Appendix	NMR Field REgulation
Siemens/Fug	Q2/Q3 Power Supply Manual
Saclay/Danfusik	Q1 Powersupply Manual
TOSP	HRS Dipole
TOSP	HRS Quadrupole Q1
TOSP	HRS Quadrupole Q2, Q3
HRS	SC Dipole Magnet Safety Review Vol. 2
HRS	SC Quad Safety Review Vol. 1

Table 4.1: Hall A Dipole Magnet Check List (15 August 1996)

Circuit Parameters:
Imax = 1800 A, L = 2.52H, Tau(slow) = 420 s, 640 MITS
Rdish = dump resistor + cable resistance = total resistance
Rtotal = .0045 + .0015 = .006 $\Omega$
Rdump .134 $\Omega$ , L= 2.55 H, Tau(fast) = 19 s, 29 MITS
Magnet Dipole	signature, date
Arm (Circle one)-Electron Arm, Hadron Arm
Megger check of coil @ 250 V DC
Visual inspection walk through
Set water inlet pressure to 100 psi
Coil A Trip Voltage (1.2V+) value
Coil B Trip Voltage (1.2V-) value
*Magnet Lead A Trip (1.2V+)
*Magnet Lead B Trip (70mV) value
*Magnet Leads are not bipolar and only work in the PS forward polarity.
Magnet lead A must be connected to the PS+
Level Trip (70%) value
Magnet Flow A Trip (60 SLPM) value
Magnet Flow B Trip (60 SLPM) value
Operational Test of trips
PS overcurrent trip (2000A)
See manual for voltage setting and gain (4V=800A)
Magnet Ready for Operation

Table 4.2: Hall A Q1 Quadrupole Magnet Check List (15 August 1996)

Circuit Parameters:
Rext = 0.075 $\Omega$ , L = 25 mH, Tau = 0.3 s, Vthreshold = .1V Imax = 3250A
Magnet (Circle one) - Q1,
Arm (Circle one) - Electron Arm, Hadron Arm
Visual inspection walk through
Set water pressure at 100 psi inlet
Coil A Trip Voltage + value_25mV
Coil B Trip Voltage (-) value_25 mV
Magnet Lead A Trip (+) Voltage_80 mV
Magnet Lead B Trip (-) Voltage_80 mV
Level Trip percent 980%)
Magnet Flow A Trip (30 SLPM+) setting
Magnet Flow B Trip (30 SLPM-) setting
Operational test of trips
Magnet Ready for Operation

Table 4.3: Hall A Q2/Q3 Quadrupole Magnet Check List (15 August 1996)

Circuit Parameters:
Rext = .125 $\Omega$ , Tau = 3 s, Quench Vthreshold = .1V, Imax = 1850A
Magnet (Circle one) - Q2, Q3
Arm (Circle one)-Electron Arm, Hadron Arm
Visual inspection walk through
Meggelr Magnet @ 250 V DC
Set water pressure at 100 psi inlet
Coil A Trip Voltage (+) value
Coil B Trip Voltage (-) value
Magnet Lead A Trip (+) Voltage
Magnet Lead B Trip (-) Voltage
Magnet Lead Trip (trim) Voltage
Level Trip percent (80%)
Magnet Flow A Trip (50 SLPM+) setting
Magnet Flow B Trip (50 SLPM-) setting
Magnet Flow trim Trip (3.6 SLPM) setting
Operational test of trips
Magnet Ready for Operation

Password: hacuser Type: HACxt or HAChp (as per instructions when you log-on). A Hall-A Main Control Window pops up, and all subsystem control windows can be accessed via pull down menus from there.