Introduction
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 indepth 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 |
| 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 ohms | |
| Rdump -.134 ohms, L=2.55 H, Tau(fast) = 19S, 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 |
| Circuit Parameters: | |
| Rext=0.075 ohms, L=25mH, Tau=0.3 sec, 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 | |
| Circuit Parameters: | |
| Rext=.125 ohms, 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 | |
The following is an abbreviated operational manual for the magnets supplied by Javier Gomez.
Account: hacuser
Password: hacuser Type: HAC A HALL-A CONTROLS window pops up with the choices:
- MAGNETS
- POSITION/POINTING
- VACUUM
- I/O MODULES
Click on MAGNETS on the left to see SUBSYSTEMS:
- Q1
- Q2
- D1
- Q3
- FIELD PROBES
Click on MAGNETS and choose D1, a window will pop up with the following description: Right Column: Check List
| Lead Voltage | OK |
| Lead 2 Voltage | OK |
| Lead1 Flow | OK |
| Coil Voltage | OK |
| LHC Level | OK |
| Cable Interlock | OK |
| External Interlck 2 | OK |
| Emergency Stop | OK |
| Power Supply | ON |
| Interlock | OK |
| Magnet | ENGAGED |
| Dump | SLOW |
| Communications | REMOTE |
In normal operation, the Power Supply should be ON, Magnet is ENGAGED and the Display should be as above.
Middle Column:
| Intrlck | RESET |
| Protection Crkt | RESET |
Control Intrlck
| Lead1 Flow | 46.3 | 1/min |
| Lead 2 Flow | 54.3 | 1/min |
| Lead1 Voltage | -0.002 | V [Should be small mV (< 20mV)] |
| Lead2 Voltage | -0.002 | V [Should be small mV (< 20mV)] |
| Coil1 Voltage | -0.002 | V [Should be small mV (< 20mV)] |
| Coil2 Voltage | -0.002 | V [Should be small mV (< 20mV)] |
VOUT not connected
LHE TProbe
Vaccum
Left Column:
| START | STOP | |
| Supply | ||
| RESET | ||
| MAGNET | CONN* | SIAX |
| DUMP | SLOW | FAST |
| IMODE | ZFCT* | SHUNT |
| VSET | 3.00 | V |
| ISET | 279.4800 | Amps |
*:normally depressed
Set the current: Use:
| ISET = | value |
verify by reading the current from DVM, I-DVM (Volts)x200 Find the Field: >From HALL-A CONTROLS choose HRSE, then choose FIELD PROBES to see HRS ELECTRON DIPOLE NMR:
The field reading (in Tesla) is in the first line. If there is a negative sign before the reading then the probe is searching. Wait till the negative sign disappears before logging the field value.
| Lead1 Flow | 30.0 | I/min [High 20's or above OK] |
| Lead2 Flow | 30.0 | I/min [High 20's or above OK] |
| MPleads | 30.0 | I/min |
| Leads VDrop | 0.05 | V [Should be low mV's] |
| Current Mon | 560.000 | A [Current Reading, Noisy-Rough Indicator] |
| Quench Signal | 0.028 | A [Should be very low] |
| Voltage Mon | 0.0232 | V |
Voltage DUMP not connected
Extern IOUT not connected
LHE TProbe not connected
Vacuum
MAIN SHUNT not connected
Controls Intrlck
Heater1
Heater2
Heater3
Heater4 The Camera terminal displays two sets of data, the upper one is for Q2 and the lower is for Q3. Each set of data shows two readings. The first line shows the field in mT DC. The second line shows the maximum field in memory the field once got to it.
To Start Q2/A3 on COMPAQ/pcC:/FUE type: RSAD14
Find the Current Radings:
In the main menu, Clock on Option and choose Node Address. Use the mouse to select:
(.) 10 or
(.) 11
Note: 10 = Q2, 11 = Q3. In the main menu, Click on ADC-Utility and choose ADC show Voltage to get:
ADW-channel1..: 0.6220
ADW-channel2..: 0.0887 [Not in used]
Then,
I/Q[*] = 0.6220 x 200 Amps [* = The Quad you chose in the previous step]
Changing the Current:
In the main menu, Click on Option and choose Node Address. Use the mouse to select:
(.) 10 or
(.) 11
Note: 10 = Q2, 11 = Q3
In the main menu, Click on DAC-Utility and choose DAC choose to get:
put hex value to DAC[Ignore it, give regular numeric value not Hex]
DAC1: Put current you want 200 [1V 200 Amps]
DAC2: Useless.
Changing the Polarity:
Change the current to 0.
In the main menu, Clock on Dig-10 and choose Output to get:
[ ] Bit 0
[ ] Bit 1
[ ] Bit 2
Use the mouse to make the selection:
[Make sure selection is correct for all 3]
[X] Bit 0
[ ] Bit 1
[ ] Bit 2
CAUTION Quad Current should not exceed 700 Amps 3.5V.
Hard Reboot hallarc14: Push the button on Rock3 in the next room.
DAC utility ADC Dis I/O Option
1 = Polarity change (Pos. = L, Neg. = H)
2 = Interlock Reset (I/O) (1=reset, 0=normal)
0 = Polarity
1 = Error (Message)
2 = Overtemp. (message)
3 = Int./Ext. (Message)
4 = InterLock (Message)
5 = Quench (Message)
Output Bits:
| Bit 0: Output Current | 0=off | 1=on |
| Bit 1: Polarity | 0=positive | 1=negative |
| Bit 2: Interlock Reset | 1=reset |
Warning: ALL of the output bits are updated simultaneiously. Make sure that they are all set correctly each time changes are made.
Input Bits:
| Bit 0: Polarity | 0=positive | 1=negative |
| Bit 1: Error | 0=fault | 1=good |
| Bit 2: Over-temperature | 0=fault | 1=good |
| Bit 3: Power Supply Control | 0=internal | 1=external |
| Bit 4: Interlock | 0=fault | 1=good |
| Bit 5: Quench | 0=fault | 1=good |
| DAC: (Analog Output) | |
| DAC1: Output Current | 1 Volt=200 Amps |
| DAC2: Not Used |
Note: Power supply output voltage cannot be set remotely.
| ADC: (Analog Input) | |
| Channel 0: Output Current | 1 Volt = 200 Amps |
| Channel 1: Output Voltage |
Power Supply RS-485 Node Addresses:
Q2=10
Q3=11