FPP Log of Cosmic Runs As of 8/15/96 the hadron arm consists of 1st scintillator array (5 paddles) (Fifth added 8/12/96) 2nd scintillator array (6 paddles) 1st FPP chamber 2nd FPP chamber ***** Data is stored on /adaq2/data3/atrig/data/scint_hadron_####.dat ***** c1 th and c2 th are thresholds on chambers 1 and 2 at the supply. The voltage at the boards is 1/150 of that. ***** c1 gas and c2 gas are the input flow in arbitrary unit. ***** DATE RUN Trigger U1 hv V1 hv U2 hv V2 hv C1 th c2 th c1 Gas c2 gas Events ---- ---- ------- ----- ----- ----- ----- ------ ----- ------ ------ ------ 8/7 1833 open 1714 1731 1699 1727 4.0 4.0 30 30 133,528 8/9 1884 1to1 1680 1680 1680 1680 4.0 4.0 30 30 33,948 8/13 1906 open 1650 1650 1650 1650 3.0 3.0 30 30 131,218 8/15 1914 open 1700 1700 1700 1700 6.0 6.0 40 40 130,857 8/20 1981 open 1700 1700 1700 1700 7.0 7.0 40 40 127,366 *** in RUN 1981 HV for Chamber 1 PLane V Modules 4-7 tripped off *** 8/23 1996 open 1700 1700 1700 1700 4.0 4.0 30 30 134,679 **** 9/7 Change gas flow thru chambers 9/9 2010 open 1700 1700 1700 1700 2.0 2.0 30 30 391,078 *** afternoon of 9/7 changed trigger to include S1pad5. 9/10 2012 open 1650 1650 1650 1650 2.0 2.0 30 30 249,426 9/11 2023 open 1700 1700 1700 1700 2.5 2.5 30 30 14,178 9/11 2024 open 1675 1675 1675 1675 2.5 2.5 30 30 12,142 9/11 2025 open 1650 1650 1650 1650 2.5 2.5 30 30 12,000 9/11 2026 open 1625 1625 1625 1625 2.5 2.5 30 30 12,000 9/12 2027 open 1675 1675 1675 1675 2.5 2.5 30 30 206,104 9/12 2030 open 1675 1675 1675 1675 4.5 4.5 30 30 17,883 9/12 2031 open 1675 1675 1675 1675 6.5 6.5 30 30 17,000 9/12 2032 open 1675 1675 1675 1675 3.5 3.5 30 30 24,225 9/12 2033 open 1725 1725 1725 1725 2.5 2.5 30 30 14,165 9/12 2034 open 1750 1750 1750 1750 2.5 2.5 30 30 9,405 **** 9/13 VDC installed **** 9/19 Placed 1/4'' shim along top rail of chamber 1. See WWW Sept 19 FPP meeting minutes. **** 9/19 Start writing data to /adaq2/data5/atrig/data/hadron_####.dat 9/20 2061 1to1 1700 1700 1700 1700 2.5 2.5 30 30 20,000 **** 9/20 In afternoon start flowing Ar/ethane 60/40 through all chambers 9/24 2086 open 1950 1950 1950 1950 2.5 2.5 30 30 244,050 *** In run 2086 VDC doesn't seem to work. C1V8-10 tripped. C1V4-7 has HV=1900. 9/25 2110 1to1 1775 1775 1775 1775 2.5 2.5 30 30 39,618 9/27 2146 open 1775 1775 1775 1775 2.5 2.5 20 20 ~13,000 9/27 2147 open 1800 1800 1800 1800 2.5 2.5 20 20 ~13,000 9/27 2149 open 1800 1800 1800 1800 2.5 2.5 20 20 6,423 9/27 2151 open 1825 1825 1825 1825 2.5 2.5 20 20 7,418 9/27 2152 open 1850 1850 1850 1850 2.5 2.5 20 20 3,278 *** Rear chambers are taking data while sitting next to space frame 10/14******** *** 10/14 gas is ar/co2 85/15 *** *** 3 paddles on top, one neutron bar bottom *** mlu_s3n is the trigger for the rear chambers, OR of top 3 and botton bar *** threshold at supply. (Remember rear 1/300 ratio) Date Run Trigger HV Thres. Gas events comments 10/14 2206 mlu_s3n 0 8.0 50 2,148 10/14 2207 mlu_s3n 1900 9.0 50 127,273 10/14 2208 mlu_s3n 1925 7.0 50 ~200,000 10/15 2209 mlu_s3n 1925 5.5 50 27,497 10/15 2218 mlu_s3n 1900 5.8 30 354,861 bad X (#245+) wires (effect X plane effic.) 10/16 2224 mlu_s3n 1930 5.2 30 50,011 noisy X wire RO board unplugged bottom scint in -X position (as was for all previous runs) 10/16 2225 mlu_s3n 1930 5.2 30 40,061 noisy X wire RO board unplugged bottom scint. in +X position 10/16 2227 mlu_s3n 1920 6.2 30 62,420 *noisy X wire RO board unplugged *bottom scint perp. to +X straws a few X wires are "hot" 10/16 2229 mlu_s3n 1975 5.0 30 11,595 "*" still apply "hot" X wires gone 10/17 2230 mlu_s3n 1976 1976 1970 1952 1970 1970 6.0 30 164,078 10/22 2262 mlu_s3n pulser th=6.0 V pamp=5.0 V wire=1->8 ~1,000 events each wire 10/22 2263 mlu_s3n pulser th=6.0 V pamp=9.0 V wire=1->8 ~1,000 events each wire 10/22 2265 mlu_s3n pulser th=6.0 V pamp=7.0 V wire=1->8 ~1,000 events each wire 10/22 2284 mlu_s3n pulser th=6.0 V pamp=6.0 V wire=1->8 ~1,000 events each wire 10/22 2285 mlu_s3n pulser th=6.0 V pamp=5.0 V wire=1->8 ~1,000 events each wire 10/22 2286 mlu_s3n pulser th=6.0 V pamp=5.0 V wire=1->8 ~1,000 events each wire pulser noise fixed 10/23 2291 mlu_s3n pulser th=7.0 V pamp=6.5 V " " " " " " 10/23 2292 mlu_s3n pulser th=7.0 V pamp=6.5 V " " " " " " "X" pulser cable moved best data yet! :) 10/25 2244 mlu_53n pulser th=7.0 v pamp=6 .5v" " " " " "improvements" on test pulse cable 10/25 2296 mlu_53n pulser th=7.0 v pamp=6.5 " " " " " Removed "improvements" on test pulser 10/25 2299 mlu_53n pulser th=7.0 v pamp=6.5 " " " " " inserted a 16 K resistor package at front5 of test pulser cabler 10/25 2300 mlu_53n pulser th=7.0 v pamp=6.5 " " " " " used HV boards at test pulse cable input 10/25 2303 mlu_53n pulser th=7.0 v pamp=6.5 " " " " " tied the pulser cable seperately to avoid noise 10/25 2304 mlu_53n pulser th=7.0 v pamp=6.5 " " " " " Reversed the pulser cable input and end DATE RUN # EVENTS HV THRESHOLD COMMENTS (@ supply) 02-DEC 5165 10200 17.0 - 17.11 = 1825v C1, C2 = 2.5v 18.0 - 18.5 = 1875v C3 = 5.0v 02-DEC 5166 10200 17.0 - 17.11 = 1825v C1, C2 = 2.5v 18.0 - 18.5 = 1925v C3 = 5.5v 02-DEC 5168 101000 17.0 - 17.11 = 1825v c1, c2 = 2.5v 18.0 - 18.5 = 1925v c3, c4 = 6.0v ch 4 =~1900v 03-DEC 5178 1200 ch3 & 4 at 1925 V ch3 & 4 at 6.0v 03-DEC 5179 1200 ch3 & 4 at 0v ch3 & 4 at 6.0v 03-DEC 5180 1200 ch3 & 4 at 0v ch3 & 4 at 0.0v LV power off for ch3 & 4 **** Do tests with pulser for chamber 4 10-DEC runs 5231 to 5238 has wires 1-8 with pulser voltage = 2V and Threshold = 6.5 *** Do pulser test for chamber 3 10-DEC runs 5239 to 5246 has wires 8-1 with pulser voltage = 2V and threshold = 5.0 *** Do cosmic run (crashed in middle of run) events = 23,000 (about) 10-DEC run 5247 Chambers 1 & 2 at HV=1825 and Threshold = 2.5V Chambers 3 & 4 at HV=1900 and threshold = 5.0V except for chamber 4 HV cables 3 and 5 set to HV = 0 VDC and scintillators ON **** 13-DEC pulser test for chamber 4 pulser amplitude 1.5V threshold = 6V runs 5274-5281 wires 4,5,6,7,8,1,2,3 ****** 15-DEC run 5283 241479 events threshold 2.5/front 5.0/rear HV 1825/front 1900/rear *** 16-DEC run 5285 265161 events threshold 2.5/front 5.5/rear HV 1825/front 1900/rear ***** 19-JAN-97 Run 5297 351949 events HV 1825/front 1900/rear "Chamber 3 2x purge rate test" 19-JAN-97 Run 5299 127068 events same HV/thres as run 5297 "Chamber 3 "really high flow" purge test (3/4 of full small bottle or pre-mixed gas in < 6 hours!!!). Run stopped AFTER bottle was empty, so we need to cut out some events from the end of the run. 20-JAN-97 Run 5305 1000 events chamber 3 channel 1 pulser run 5307 " 2 5308 " 3 5309 " 4 5310 " 5 5311 " 6 5317 " 7 5318 " 8 26-FEB-97 Run 5504 ??? events (overnight run...so prob 100K+) ch 1 & 2: off ch 3 HV 1900 thres 5.0 ch 4 HV 1925 thres 5.0 09-MAR-97 Coincidence runs hadron magnets kept constant RUN HV CH1&2 Thres CH1&2 HV CH3&4 Thres CH3&4 --- ------- ---------- --------- ----------- 5812 1825 3.5 1900 7.0 100365 events 5813 1800 3.5 1875 7.0 84490 5814 1850 3.5 1925 7.0 90096 5815 1775 3.5 1850 7.0 98115 5816 1875 3.5 1950 7.0 107125 5817 1825 2.5 1900 5.0 98513 5818 1825 3.0 1900 6.0 154778 5819 1925 4.0 1900 4.0 ?? 14 - 16 March 1997 first FPP development run magnets constant, singles+coincidences HVfront=1850 HVrear=1900 Thresfront=3.5 Thresrear=7.0 RUN events analyzer comment ------- ------- -------- --------- 5862 350K none 5863 100K none 5864 0 none 5865 691K none 5866 737K none 5867 150K none 5868 230k none 5869 390K none 5870 455K none 5871 380K none 5872 402K none 5873 238K none 5874 413K none 5875 527K none 5876 530K none events estimated 5877 100K none events estimated 5878 126K none 5879 0 none 5880 477K none 5881 470K none 5882 0 none 5883 0 none 5884 0 none 5885 280K none chambers 3 and 4 misaligned, events estimated 5886 280K none chambers 1 and 3 misaligned, problems ch. 4 LV 5887 25K none chambers 1 and 3 misaligned 5888 20K none all chambers in standard position 5889 10K none Q1 electron arm quenched, electron arm off 5890 0 none electron off in this and future runs 5891 5K 3 in. 5892 0 3 in. 5893 579K 3 in. 5894 25K 3 in. events estimated 5895 54K 3 in. 5896 350K 3 in. 5897 450K 3 in. events estimated 5898 450K 3 in. 5899 450K 3 in. events estimated, Q3 tripped off 5900 450K 3 in. events estimated 5901 0 3 in. 5902 487K 3 in. 5903 193K 3 in. 5904 530K 3 in. 5905 427K 3 in. 5906 3 in. 5866 737K