American-magnetics AMI Superconducting Magnets User Manual

AMIAMI SUPERCONDUCTING MAGNETSINSTALLATION, OPERATION, ANDMAINTENANCE INSTRUCTIONSRev. 4, September 1996PO Box 2509, 112 Flint Road, Oak Ridge, TN 378

91 InstallationUnpack the magnetCarefully remove the magnet from the shipping carton and remove all packaging material. Inspect all contents for any d

10InstallationSetupBe careful not to disturb the wiring located on the top of the magnet. Only the magnet current leads are to be bent and/or soldered

11InstallationSetup

12InstallationCooldownCooldownBe sure the magnet and support assembly are free of all moisture and contaminants prior to magnet cooldown.1. Precooling

13InstallationInstrumentation and control checkNoteAn 18-24" piece of tubing, connected to the top vent of each lead, and allowed to hang over th

14InstallationSystem setupturn off when a quench occurs in a superconducting magnet. The result is that these power supplies can drive more than 100 a

152 OperationEnergizing the magnet1. If the magnet is equipped with a persistent switch, make sure the persistent switch heater power supply is switch

16OperationPersistent operationMagnet persistent operation (if applicable)1. Stabilize the magnet current at the desired current level. Current stabil

17OperationDeenergizing the magnetcurrent level differences may cause the programmer/ power supply system to interpret the equalizing voltage as a mag

18OperationSystem shutdown

1IntroductionThese instructions are written to be generic and apply to most of the various types of magnets supplied by AMI. Some sections and data ma

193 TroubleshootingThe following troubleshooting aids are included to assist he user in identifying and correcting magnet system problems. In the even

20TroubleshootingSlow charging, discharging, or quenchingb. Make sure the programmer or power supply is not current limiting. Refer to the power suppl

214 Warranty/Return AuthorizationAll products manufactured by AMI are warranted to be free of defects in materials and workmanship and to perform as s

22Warranty/Return Authorization

23IndexCcharging voltage 4clear bore 4construction 1cooldown 12precooling 12Ddeenergizing the magnet 17diode protection 1Eenergizing the magnet 1

24Index

2IntroductionPersistent ModeAfter it has been energized, a superconducting magnet can be operated in the persistent mode by short circuiting the magne

3SpecificationsThe above diagram is an example of a typical Magnet Specification Sheet. The specifications for the magnet are mailed to the customer a

4SpecificationsMagnet Specification Sheetmagnetic resonance (NMR) tests at 4.2K or by calculation if NMR checks are not possible.2.Rated Current - The

5SpecificationsMagnet Specification Sheet15.Magnet Resistance in Parallel with Switch - Magnet resistance in parallel with switch is the room temperat

6SpecificationsMagnet Specification Sheet

7Table of ContentsSpecifications......31 Installation...

8Table of Contents