From MORSE@bnlarm.bnl.govMon Jun 24 08:15:29 1996 Date: Tue, 18 Jun 1996 08:29:36 -0400 (EDT) From: "William M. Morse" To: earle@buphy.bu.edu, monich@buphyc.bu.edu, varner@buphyc.bu.edu, OUYANG@buphyc.bu.edu, CAREY@buphyc.bu.edu, mapes@BNLDAG.AGS.BNL.GOV, krienen@BNLDAG.AGS.BNL.GOV, tallerico@BNLDAG.AGS.BNL.GOV, messier@buphy.bu.edu Subject: E821 Minutes Resent-From: MORSE@bnlajc.bnl.gov Resent-Date: Tue, 18 Jun 1996 08:30:36 -0400 (EDT) Resent-To: stillman@stillman_a.ags.bnl.gov, woodle@ad1.ags.bnl.gov, YIM@INP.NSK.SU, dz@budoe.bu.edu Minutes of June 14, 1996 Magnet Testing Meeting The UPS power supply is down. While it is being repaired, lab emergency power has been patched to the breakers supplied by the UPS. It turns out the Cryo Control Room does not have a lab emergency power receptacle, they have only UPS and LILCO. Gerry will check into getting a lab emergency power receptacle in Cryo Control. The vacuum pumps are now in remote control. Gerry pointed out we should always have at least one in local. This has been done. Bill Morse gave vacuum control training after the meeting. Joe Geller pointed out that the power supply cooling water should not left on when the power supply is off. In this weather, the water temperature could easily be below the dew point. The vacuum has a few small leaks; nothing serious. Bill suggested that after we have been cold for two weeks, we warm up to about 40K to investigate the flash (air freezes on the cold mandrel and flashes during warm-up). We must remove the fake inflector and put on the edge bumps before we power the magnet. Hopefully, the detector guys will get lots of inflector flash data before we are cold. The estimate is the cool-down will be complete around June 22. We reviewed what needs to be done before we power: 1. Area clean-up - John Benante. 2. Check electrical grounds - Bill Morse. 3. We decided to start with the following Quench Protection Parameters: a) coil differences - 100 mV b) coil interconnects - 10 mV c) outer cross-over - 5mV d) gas-cooled leads - 20mV alarm; 30mV trip e) soft-ware maximum power supply voltage - 3V 4. Setup and check quench protection and monitoring - Matthias Perdkamp. 5. Setup and test power supply control - Ralf Prigl and Mark OToole. 6. Ramp to half-current. a) ramp to 1000A at 5A/s (180W eddy current heating). b) extract energy as system test. c) ramp to 1000A at 5A/s, then 2450A at 2A/s. d) measure mandrel and shield positions through windows. e) measure field with the commercial nmr probe around ring. f) measure radial field through kicker hole. 7. Ramp up 300A at 1.5A/s. a) measure mandrel and shield positions through windows. b) if movement - measure field with the commercial nmr probe around ring. c) if no movement and I<5200A, go to 7. At around 3700A, we will measure the radial field through the kicker hole. Also during all this we will be recording the strain gauge readings. Respectfully submitted - Bill Morse.