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Minutes of Regular Hall C Meeting

November 6 2000@ 3:00 p.m.

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• Engineering (Bill Vulcan)

• AC for clean power for G0 is in. Panel is in
• Cage came in (G0) Friday. Bennett will arrange for Neil Wilson to put up cage if Plant Services is backlogged.

• Engineering (Paul Brindza)

• Still working on Gen/Day
• PMT holders are complete
• G0 design for cryolines for target test is finalized
• Outside design work on SOS stairs look good
• Tech’s get another section of G0 transfer line and gas line done
• G0 vacuum system, needs to be worked on

• Beam line (Chen Yan)

• Working list for other Gen technical support
• Modification of 2 Gen target superharps
• Installation of the 2 M20 target BPM’s and related electronics
• Resume chicane optics
• New Gen raster system (750 Hz, 30 Hz)

• Energy Measurement (Dave Mack)

• New field integral lacks a small correction for curvature and an even smaller correction for body gradients
• Showed what we would expect, assuming the old Hall C field integrals are wrong and the new ones are right.

• Gen (Simon Taylor)

• Beam related issues:
• The fast raster has been set to the wrong beam energy. (1-pass instead of 2-pass). This was fixed
• MCC had difficulty getting both the 3H00A and 3H00C bpms to the values we specified
• Target: The LD₂ and LH₂ fans stopped working and the loop 2 fan did not come back on. Both are working now at about 45 H_z
• Dipole magnet: The helium dropped. The dipole could not be turned up after the helium was recovered. The quench detectors kept tripping. Finally resolved.