Peter Kammel wrote: > Dear Konrad, > > Today in the morning, when nobody was around, the sep apparently decided > to increase the HV from 190 to 200 kV. Alas we noticed only later, > after people had been working in the area. There was a lot of > sparking, so that's a potential safety hazard and of course, > deflects the beam. I attach a snippet form the txt file > 20060410_HeinzingerLog.txt. Any idea what happened? > > Thanks > > Peter > > > > Peter Kammel / pkammel@uiuc.edu > Department of Physics, Loomis Laboratory > University of Illinois at Urbana-Champaign > 1110 West Green Street, Urbana, IL 61801 > Tel (217) 333-5424 / Fax (217) 333-1215 > > > > ------------------------------------------------------------------------ > > 10/04/2006 07:16:06 3227490966.6 189.9 3.0 0.0 0.0 0.0000082620 > 10/04/2006 07:17:06 3227491026.6 189.9 3.4 0.0 0.0 0.0000081930 > 10/04/2006 07:18:06 3227491086.6 189.9 4.0 0.0 0.0 0.0000081580 > 10/04/2006 07:19:06 3227491146.6 189.9 4.1 0.0 0.0 0.0000081730 > 10/04/2006 07:20:06 3227491206.6 189.9 2.9 0.0 0.0 0.0000081760 > 10/04/2006 07:21:06 3227491266.6 189.9 3.5 0.0 0.0 0.0000081680 > 10/04/2006 07:22:06 3227491326.6 189.9 3.0 0.0 0.0 0.0000082900 > 10/04/2006 07:23:06 3227491386.6 189.9 3.5 0.0 0.0 0.0000082110 > 10/04/2006 07:24:06 3227491446.6 189.9 3.1 0.0 0.0 0.0000081200 > 10/04/2006 07:25:06 3227491506.6 189.9 4.1 0.0 0.0 0.0000081900 > 10/04/2006 07:26:06 3227491566.6 189.9 2.9 0.0 0.0 0.0000081410 > 10/04/2006 07:27:06 3227491626.6 189.9 4.1 0.0 0.0 0.0000081230 > 10/04/2006 07:28:06 3227491686.6 189.9 3.3 0.0 0.0 0.0000082290 > 10/04/2006 07:29:06 3227491746.6 189.9 4.0 0.0 0.0 0.0000082110 > 10/04/2006 07:30:06 3227491806.6 189.9 4.5 0.0 0.0 0.0000081580 > 10/04/2006 07:31:06 3227491866.6 189.9 3.5 0.0 0.0 0.0000081970 > 10/04/2006 07:32:06 3227491926.6 189.9 3.6 0.0 0.0 0.0000081230 > 10/04/2006 07:33:06 3227491986.6 189.9 3.5 0.0 0.0 0.0000081680 > 10/04/2006 07:34:06 3227492046.6 189.9 3.6 0.0 0.0 0.0000081840 > 10/04/2006 07:35:06 3227492106.6 189.9 3.5 0.0 0.0 0.0000081440 > 10/04/2006 07:36:06 3227492166.6 189.9 3.5 0.0 0.0 0.0000081520 > 10/04/2006 07:37:06 3227492226.6 189.9 2.9 0.0 0.0 0.0000081620 > 10/04/2006 07:38:06 3227492286.6 189.9 3.0 0.0 0.0 0.0000081410 > 10/04/2006 07:39:06 3227492346.6 189.9 3.1 0.0 0.0 0.0000081410 > 10/04/2006 07:40:06 3227492406.6 189.9 3.4 0.0 0.0 0.0000081620 > 10/04/2006 07:41:06 3227492466.6 189.9 3.6 0.0 0.0 0.0000081680 > 10/04/2006 07:42:06 3227492526.6 189.9 3.0 0.0 0.0 0.0000081730 > 10/04/2006 07:43:06 3227492586.6 189.9 3.8 0.0 0.0 0.0000081360 > 10/04/2006 07:44:06 3227492646.6 189.9 3.0 0.0 0.0 0.0000081840 > 10/04/2006 07:45:06 3227492706.6 189.9 3.0 0.0 0.0 0.0000081580 > 10/04/2006 07:46:06 3227492766.6 189.9 3.3 0.0 0.0 0.0000081580 > 10/04/2006 07:47:06 3227492826.6 189.9 3.8 0.0 0.0 0.0000082010 > 10/04/2006 07:48:06 3227492886.6 189.9 3.3 0.0 0.0 0.0000082010 > 10/04/2006 07:49:06 3227492946.6 189.9 3.5 0.0 0.0 0.0000081760 > 10/04/2006 07:49:18 3227492958.0 191.6 111.3 0.0 0.0 0.0000110700 > 10/04/2006 07:49:22 3227492962.6 178.2 147.9 0.0 0.0 0.0000125100 > 10/04/2006 07:49:27 3227492967.6 175.3 111.7 0.0 0.0 0.0000129500 > 10/04/2006 07:49:32 3227492972.6 191.5 109.4 0.0 0.0 0.0000128100 > 10/04/2006 07:49:37 3227492977.6 192.6 120.9 0.0 0.0 0.0000126000 > 10/04/2006 07:49:42 3227492982.6 192.4 107.7 0.0 0.0 0.0000127300 > 10/04/2006 07:49:47 3227492987.6 192.5 110.0 0.0 0.0 0.0000124300 > 10/04/2006 07:49:52 3227492992.6 192.9 109.8 0.0 0.0 0.0000127700 > 10/04/2006 07:49:57 3227492997.6 161.1 158.5 0.0 0.0 0.0000129000 > 10/04/2006 07:50:02 3227493002.6 193.3 108.8 0.0 0.0 0.0000131700 > 10/04/2006 07:50:07 3227493007.6 169.5 143.4 0.0 0.0 0.0000130200 > 10/04/2006 07:50:12 3227493012.6 193.4 117.7 0.0 0.0 0.0000128300 > 10/04/2006 07:50:17 3227493017.6 150.6 173.5 0.0 0.0 0.0000133700 > 10/04/2006 07:50:22 3227493022.6 144.9 181.8 0.0 0.0 0.0000135100 > 10/04/2006 07:50:27 3227493027.6 166.1 151.0 0.0 0.0 0.0000139800 > 10/04/2006 07:50:32 3227493032.6 194.3 104.9 0.0 0.0 0.0000139800 > 10/04/2006 07:50:37 3227493037.6 194.0 98.6 0.0 0.0 0.0000136000 > 10/04/2006 07:50:42 3227493042.6 158.4 162.0 0.0 0.0 0.0000137700 > 10/04/2006 07:50:47 3227493047.6 195.2 103.8 0.0 0.0 0.0000136800 > 10/04/2006 07:50:52 3227493052.6 142.5 185.3 0.0 0.0 0.0000133500 > 10/04/2006 07:50:57 3227493057.6 194.7 106.7 0.0 0.0 0.0000135500 > 10/04/2006 07:51:02 3227493062.6 195.1 105.5 0.0 0.0 0.0000134000 > 10/04/2006 07:51:07 3227493067.6 194.3 107.2 0.0 0.0 0.0000134800 > 10/04/2006 07:51:12 3227493072.6 194.5 106.8 0.0 0.0 0.0000135300 > 10/04/2006 07:51:17 3227493077.6 156.5 163.4 0.0 0.0 0.0000138900 > 10/04/2006 07:51:22 3227493082.6 195.7 104.9 0.0 0.0 0.0000139100 > 10/04/2006 07:51:27 3227493087.6 130.7 203.5 0.0 0.0 0.0000141600 > 10/04/2006 07:51:32 3227493092.6 168.3 147.1 0.0 0.0 0.0000138500 > 10/04/2006 07:51:37 3227493097.6 174.9 135.1 0.0 0.0 0.0000140700 > 10/04/2006 07:51:42 3227493102.6 195.1 103.6 0.0 0.0 0.0000139900 > 10/04/2006 07:51:47 3227493107.6 195.2 105.9 0.0 0.0 0.0000138800 > 10/04/2006 07:51:52 3227493112.6 195.3 104.7 0.0 0.0 0.0000137000 > 10/04/2006 07:51:57 3227493117.6 195.5 105.3 0.0 0.0 0.0000142700 > 10/04/2006 07:52:07 3227493127.5 195.6 0.0 0.0 0.0 0.0000143300 > 10/04/2006 07:52:36 3227493156.3 0.0 0.0 0.0 0.0 0.0000000000 > 10/04/2006 07:52:55 3227493175.9 0.0 0.0 0.0 0.0 0.0000000000 > 10/04/2006 07:56:59 3227493419.6 198.9 94.1 0.0 0.0 0.0000116800 > 10/04/2006 07:57:33 3227493453.4 198.9 7.9 0.0 0.0 0.0000108600 > 10/04/2006 07:57:40 3227493460.6 198.9 3.7 0.0 0.0 0.0000109500 > 10/04/2006 07:57:48 3227493468.7 188.4 114.3 0.0 0.0 0.0000102900 > 10/04/2006 07:57:56 3227493476.6 198.9 67.2 0.0 0.0 0.0000114000 > 10/04/2006 07:58:04 3227493484.6 198.9 6.1 0.0 0.0 0.0000103100 > 10/04/2006 07:58:12 3227493492.6 198.9 75.3 0.0 0.0 0.0000106700 > 10/04/2006 07:58:20 3227493500.6 198.9 69.9 0.0 0.0 0.0000112200 > 10/04/2006 07:58:28 3227493508.6 198.9 3.3 0.0 0.0 0.0000105800 > 10/04/2006 07:58:36 3227493516.6 198.9 7.9 0.0 0.0 0.0000096400 > 10/04/2006 07:58:44 3227493524.6 198.9 66.2 0.0 0.0 0.0000101300 > 10/04/2006 07:58:52 3227493532.6 198.9 3.4 0.0 0.0 0.0000105800 > 10/04/2006 07:59:00 3227493540.6 198.9 5.9 0.0 0.0 0.0000095400 > 10/04/2006 07:59:08 3227493548.6 198.9 96.1 0.0 0.0 0.0000101700 > 10/04/2006 07:59:16 3227493556.6 198.9 3.6 0.0 0.0 0.0000096820 > 10/04/2006 07:59:24 3227493564.6 198.9 20.8 0.0 0.0 0.0000093180 > 10/04/2006 07:59:32 3227493572.6 198.9 3.7 0.0 0.0 0.0000095260 > 10/04/2006 07:59:40 3227493580.6 198.9 7.5 0.0 0.0 0.0000091530 > 10/04/2006 07:59:48 3227493588.6 162.5 118.5 0.0 0.0 0.0000099830 > 10/04/2006 07:59:56 3227493596.6 198.9 3.3 0.0 0.0 0.0000106100 > 10/04/2006 08:00:04 3227493604.6 198.9 3.4 0.0 0.0 0.0000095200 > 10/04/2006 08:00:12 3227493612.6 198.9 36.2 0.0 0.0 0.0000092370 > 10/04/2006 08:00:20 3227493620.6 198.9 3.8 0.0 0.0 0.0000104600 > 10/04/2006 08:00:28 3227493628.6 198.9 3.4 0.0 0.0 0.0000094070 > 10/04/2006 08:00:36 3227493636.6 198.9 39.9 0.0 0.0 0.0000091330 > 10/04/2006 08:00:44 3227493644.6 198.9 3.7 0.0 0.0 0.0000095230 > 10/04/2006 08:00:52 3227493652.6 198.9 4.9 0.0 0.0 0.0000089860 > 10/04/2006 08:01:00 3227493660.6 198.9 89.8 0.0 0.0 0.0000092320 > 10/04/2006 08:01:08 3227493668.6 198.9 3.6 0.0 0.0 0.0000094070 > 10/04/2006 08:01:16 3227493676.6 198.9 10.0 0.0 0.0 0.0000090430 > 10/04/2006 08:01:24 3227493684.6 198.9 3.4 0.0 0.0 0.0000096940 > 10/04/2006 08:01:32 3227493692.6 198.9 10.2 0.0 0.0 0.0000091860 > 10/04/2006 08:01:40 3227493700.6 198.9 3.6 0.0 0.0 0.0000096960 > 10/04/2006 08:01:48 3227493708.6 198.9 5.4 0.0 0.0 0.0000091210 > 10/04/2006 08:01:56 3227493716.6 198.9 73.3 0.0 0.0 0.0000094420 > 10/04/2006 08:02:04 3227493724.6 198.9 3.3 0.0 0.0 0.0000099990 > 10/04/2006 08:02:12 3227493732.6 198.9 6.5 0.0 0.0 0.0000091330 > 10/ > Hello Peter, this was clearly our fault. We discovered some problems with the separator control programs. We decided to restart everything several times and went to 199 kV for some time. At the end we forgot to go back to 190kV. Fortunately the separator was only sparking from time to time and was not drawing a high current for an extended period. We will install a radiation monitor in the next days, which can give an acoustical alarm. In addition you could implement the separator control into your DAQ. I attached a document describing the procedure. Sorry for this Konrad -- ========================== Konrad Deiters , GFA Tel.: +41 56 310 42 41 Fax : +41 56 310 32 94 http://www.psi.ch/ Paul Scherrer Institut CH-5232 Villigen / PSI ==========================
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Sepii.pdf
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Separator Commands.pdf
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