Message-Id: <200410211021.i9LALuAg013375@neutrino.kek.jp> Subject: Minutes of K2K Steering Meeting (Oct.21) Date: Thu, 21 Oct 2004 19:21:54 +0900 From: Takanobu Ishii <ishii@neutrino.kek.jp> ========================================================================= *General Report* ------------------------------------------------------------------------- Finally the beam recovered from the arc magnet problem, accelerator troubles and the typhoon influence. As of 17:30 on Oct.21, the beam looks good. ========================================================================= *Schedule* ------------------------------------------------------------------------- ===Beam=== Oct.24(Sun) 1:00 Neutrino beam stops 1:00 ; Dump-mode-change by Hayato 1:00- Machine study (electron cloud) 9:00- JPARC monitor test 17:00- Machine study (8GeV) Oct.25(Mon) 9:00- Machine maintenance, horn maintenance 18:00- 12GeV MR tuning ~20:00 After beam channel tuning, neutrino beam starts ~20:00 ; Dump-mode-change by Ishii ===Detector=== Somewhen between Oct.24(Sun) 1:00- SCIFI cosmic-ray run, LED run, -Oct.25(Mon)16:00 MUMON dummy-spill run ===Shift=== Nu-H shifts of Oct.23-C, 24-A,B,C, 25-A should do a hardware check once and he is free. NH-CR shifts of Oct.23-C, 24-A,B,C, 25-A are canceled. Shift time at KEK (SK shift is a little different) A-shift : 9:00-17:15 B-shift : 17:00-25:15 C-shift : 25:00-9:15(next day) ========================================================================= *Reports from each subcomponent* ------------------------------------------------------------------------- ===BEAM MONITOR=== (Sato) No neutrino beam until Tuesday due to Arc magnets repairing. Beam was resumed at 9 on Tuesday(10/19). No muon direction shift has been observed since then. On Wednesday, beam was down from 12 to 16 due to MR RF repairing, At 23, one of the pits in the PS was flooded and beam was stopped. Beam will be resumed in this evening. ===MRD=== (Ishii) The MRD has been working without any problem this week. ===1KT=== (Kameda) 1kton detector has been working w/o big trouble this week. But yesterday midnight, during the beam stop, one of four compensation coil down. The reason is unknown, and we need investigation. ===SCIFI=== (Iwashita/Ishida) The SciFi is working fine this week. Oct. 12 CR data show efficiency drop of IIT#17. It turns out that the IIT bundle attachment is slightly changed. It is quite possibly due to the big earthquake (Oct.6th). After taking new EL data on Oct.15 and updating CCDmap, it is recovered to the normal value. ===VETO=== (Nitta) No problem. ===SCIBAR=== (M.Hasegawa) The SciBar has been working without any problem in this week. We have no plan for next beam-off. ===SK=== (Obayashi) Troubles: Oct 19 2:00 - 11:00 (Beam is off) TKO power supply was broken and replaced Oct 20 23:30 - Oct.21 11:30 Power failure(~7hours) both at SK and Kenkyuto After the recovery, SK DAQ started around 11:30. No serious damage has been found. Schedule: Nothing special, so far ========================================================================= SUMMARY of NORTH COUNTER HALL SHIFT (M.Hasegawa) ========================================================================= -------------------------------------------- This week: 54.64% Live : 1836 / Dead : 1524 (acc: 1263 / DAQetc. : 261) 2004/10/21 01:00 So far: (From Apr-3-2003) 86.34% Live : 223935 / Dead : 36672 (acc: 25005 / DAQetc. : 11667) -------------------------------------------- Oct 14 2004 A shift Y.Takubo - No beam, for and MR tuning. Oct 14 2004 B shift H.Nishino 16:47 Run 9215 started (MR tuning) 18:55 shift cancelled Oct 19 2004 A shift Y.Takubo 11:20 Run 9247 started (normal mode) 14:05 Booster RF become unstable 14:05 Run 9248 started (beam unstable) 14:23 Booster RF tuning was finished. 14:23 Run 9248 started (normal mode) Oct 19 2004 B shift Y.Takenaga 16:58 Run 9250 started (normal) 00:53 beam stopped Oct 20 2004 C shift T. Nakaya 00:54 Run 9251 started (normal) 01:05 beam back 08:32 Beam stop (booster RF down) 08:33 beam back Oct. 20 2004 A-Shift K.Hiraide 08:58 Run #9252 started (normal) 12:10 beam intensity is down (MR RF is out of condition) 12:12 beam stopped run #9253 started (booster mode) 13:15 mode change (arc -> 1st dump) by Hayato-san 16:15 EP1 beam recovered run #9254 started (dump mode) 16:33 mode change (1st dump -> arc) by Ishii-san Run #9255 started (arc mode) 16:45 Run #9256 started (normal mode) Oct. 20 2004 B-Shift Y.Takenaga 16:53 Run 9257 started (normal mode) 22:59 Power of main ring is down beam stopped 23:01 Run 9258 started (booster mode) One of the cables of main ring power machine is flooded. It cannot recoverd till next morning. Oct. 21 2004 C-shift T.Nakaya We have no beam by morning. SK is down. PS is down. They will recover tomorrow. --> C shift is canceled both for nu-hall and NCH. TN keeps PHS2408 , and come back at NCH around 8:30. ============================================================================== SUMMARY OF NEUTRINO HALL SHIFT (M.Y.Pac) ============================================================================== from Oct. 19 to Oct. 21 2004 run # 6049 ( 2004/10/19 11:30 - 2004/10/19 23:35 ) Horn: H1 = 249.44 H2 = 248.85 , Main Ring: 0.00 , Target 4.28 Shift : Pac.M.Y comment(start): Neutrino beam started comment(stop) : 12 hours rule run # 6050 ( 2004/10/19 23:45 - 2004/10/20 04:05 ) Horn: H1 = 249.00 H2 = 248.00 , Main Ring: 4.50 , Target 4.10 Shift : Kielczewska comment(start): normal/all comment(stop) : Sci-Fi monitor not working. Spill number incosistent. run # 6051 ( 2004/10/20 04:10 - 2004/10/20 12:30 ) Horn: H1 = 249.00 H2 = 248.30 , Main Ring: 4.52 , Target 4.05 Shift : Novella comment(start): normal run comment(stop) : PS beam stop run # 6052 ( 2004/10/24 17:00 - 2004/10/20 17:07 ) Horn: H1 = 249.16 H2 = 248.45 , Main Ring: 5.27 , Target 4.58 Shift : Pac.M.Y. comment(start): neutrino beam started again comment(stop) : bad run - spill number inconsistent run # 6053 ( 2004/10/20 17:10 - 2004/10/20 17:13 ) Horn: H1 = 249.00 H2 = 248.00 , Main Ring: 4.52 , Target 4.03 Shift : Kielczewska comment(start): normal/all comment(stop) : Scibar TA monitor: not all TAs working run # 6054 ( 2004/10/20 - 2004/10/20 23:13 ) Horn: H1 = 249.00 H2 = 248.00 , Main Ring: 5.00 , Target 4.40 Shift : Kielczewska comment(start): normal/all comment(stop) : Beam stopped =========================================================================
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