Twin Solenoid Magnet

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Superconducting Solenoid Magnet For Rare Nuclear Beam
Production
Description

The system is consisting of the Following items:

1- Superconducting Magnet (1 unit)

• Solenoid configuration.
• 5 Tm magnetic field integral at approximately 97 amperes.
• Inductance of approximately 284 henries.
• Stored energy of approximately 1.3 MJ.
• High “ON” resistance persistent mode switch installed.
• Persistent mode drift of 1ppm/hour or less.
• Fully protected against damage due to quench.
• Redundant pairs of voltage taps will be provided.
• Installed in dewar described below.

2- Recondensing Dewar (1 unit)

• Contains a 4.2K pulse-tube cryocooler to reduce or stop liquid helium boil off.
• Horizontal room temperature bore, welded aluminum construction.
• 300 mm (11.81”) room temperature bore diameter.
• 1054 mm (41.5”) system length.
• Liquid helium capacity: 75 liters refill / 100 liters total
• Liquid helium boil off rate: Zero in static mode
• No liquid nitrogen required.
• Estimated liquid helium refill of 90 days assuming 1 charge per day
(Note: Refill intervals are dependent on charge rate).
• Redundant liquid helium level sensors installed.
• LN2 precool/removal tube.
• Safety sealed quench relief system.
• Vacuum space safety drop out plate.
• 15 foot long instrumentation cabling.
• One (1) ruthenium oxide temperature and one (1) PT-100 installed for
temperature monitoring.
• The magnetic and optical axes of the superconducting magnets and dewar
bores will be aligned to within +/- 1.0mm of each other from end to end
over the full range of operating current and field.
• XYZ alignment mounts provided. XYZ alignment mechanisms not
included in this offer.

Cryocooler Specifications

• 1.5W @ 4.2K pulse tube cryocooler.
• Water cooled compressor.
• Input power requirement of 380Vac, 3-phase, 50 Hz.
• Cooling water requirement of 9 liters/minute. Cooling water temperature maximum of 27°C.
• 66 ft. (20.2 m) length flex lines
• One (1) ruthenium oxide temperature installed on the 1st stage of the cold head to monitor temperature
during operation.
• One (1) ruthenium oxide temperature sensor installed on the 2nd stage of the cold head to monitor temperature during operation.
• The compressor service interval is 15,000 hours. This is a simple adsorber replacement.

3- Helium Reliquifier Control System (1 unit)

• Designed to control liquefying rate of Cryomech PT410 and PT415
helium reliquefiers by constantly monitoring pressure in the
superconducting magnet system’s helium chamber.
• Positive pressure will always be present within the helium chamber,
thereby reducing the risk of ice formation.
• Features a digital display.

4- Liquid Cryogen Monitor (1 unit)

• Bright vacuum fluorescent display.
• Simple, intuitive user interface.
• Sample and hold operation (1 minute to 99 hours settability).
• Manual update or continuous operation.
• Sensor de-ice cycle. (LHe only)
• Sensor calibration via front panel menu.
• Can drive sensors up to 200cm active.
• High and low setpoint control output.
• RS-232 interface.
• LabVIEW® drivers available.

5- Temperature Monitor (1 unit)

• Bright, two line vacuum fluorescent display.
• RS-232 computer interface.
• Capability to store custom curves.
• Temperature displayed in Kelvin, Celsius, Fahrenheit, or expressed as a
resistance.
• Audible alarm (can be silenced).
• Control output with high and low setpoints.
• Monitors most resistive temperature sensors (ruthenium oxide, platinum,
carbon, etc.).
• Simple keypad with good tactile response.
• LabVIEW® drivers available at no extra charge.


6- Integrated Superconducting Magnet Power System (1 unit)

The Model 4G-100 is a single output model with output current up to ± 100
amperes at 800 watts (± 10 volts up to 80 amperes, ± 8 volts at 100 amperes).
• 4-quadrant, true bipolar systems featuring smooth sweeps through zero.
• Automatic quench detection and protection.
• A full color, backlit TFT liquid crystal display clearly indicates output
current, voltage, limit settings, and system status.
• Five (5) programmable sweep rate ranges.
• 15 foot length output cables.
• Safety interlocks for persistent switch enable/disable and changing of
important magnet parameters and limits.
• Visual confirmation of current present in leads will alert users to be mindful of safety when operating the
power supply, even if line power is off.
• Ripple and noise: 20 uA rms @ 100A.
• Stability (drift) at 25 ± 1C: ± 3mA / °C ± 0.01% Vmax.
• Display Resolution: 0.1 mA, 1 mV.
• Display Update Rate: ~ 500ms intervals.
• Output Current Setability: 0.1 mA.
• Sweep Rate Resolution: 0.1 mA/sec.
• Source effect (line regulation for any line change within the rated line
voltage): 0.005% Imax 0.05% Vmax.
• Load effect (load regulation for a load change equal to max. voltage in constant current mode or max.
current in constant voltage mode): 0.01% Imax 0.01% Imax.
• Output Protection: Protected from damage due to quench
5/9 Superconducting Solenoid Magnet For Rare Nuclear Beam Production / PK11-0105-OF48-I
• Persistent Switch Heater 0-125mA 0-12V.
• AC Input: 220-230V a.c., 50-60 Hz, 10A max.
• Fuses: 10A, 250V a.c., slow blow.
• Operating Temperature: 15 °C to 35 °C, Relative Humidity 10% to 95%, non-condensing.
• Over-Temperature Protection: Unit will limit discharge power to prevent overheating.
• Overall Dimensions (excluding front handles): 483 mm W X 133 mm H X 533 mm D.
• USB interface: USB 1.1/2.0 Full-Speed.
• IEEE-488 interface: IEEE-488.2-1992 Standard.
• Ethernet: IEEE-802.3 10/100 BASE-T.
• Shut-down Input: +5V, +24V, or switch closure signaling.

7- Fast-dump Energy Absorber (1 unit)

• Manually controlled.
• Enables the superconducting magnet to be discharged in a controlled
manner at approximately 30 volts.

8- Electronics Cabinet (1 unit)
All electronics will be conveniently housed in this industry-standard, 19”
inside width cabinet.

9- Magnetic Measurement
The axial magnetic field in the centre of the solenoid will be measured at Pantechnik with a Hall probe for the
maximum excitation current. The magnetic field will be measured in steps of 2 cm over 1.5 m length. The
magnetic measurements is done in the presence of the Customer.