Difference between revisions of "201204 R1ProgressRep"
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Strung 91 Field wires. | Strung 91 Field wires. | ||
Revision as of 21:39, 25 April 2012
4/2/2012
Started stringing SL1. Strung 48 guard wires, now on row 45 SL1.
R1 S1 sense wire signals
4/3/2012
Column is high number
Continued stringing SL1 guard wires. Strung 35 wires, now on row 80.
Soldered more stringing chains.
4/4/12
HVB-2
Strung 75 Guard wires (now on row 156).
4/5/12
Mounted Chamber 5 on A-Frame. Strung 44 guard wires through row 200.
Background counts:
27 pulses/61806 Sec.
SL2 Column 132 row 2
Preamp voltage 6.3V
Discriminator threshold 46mV
4/6/12
Mounted magnet and stringing rail on Chamber 5. Strung 33 guard wires finishing guards on Chamber 6.
Cosmic counts:
180932 pulses/72973 Sec
SL1 HVB3 Column 80 Row 2
Discriminator threshold - 46mV
Preamp voltage - 6.3V
4/9/12
Visual inspection of Ch 6 Guard wires complete. Ready to start stringing Field wires tomorrow.
Mounted stringing arm and stringing machine on Ch 5. Ch 5 ready for stringing.
Background count:
4531 pulses/ 69564 sec.
SL1 HVB5 Column 138 Row 2
Preamp voltage - 6.3V
Discriminator threshold 46mV
4/10/12
Aligned Ch 6 for SL2 stringing. Strung 36 Field wires through row 7.
Background counts:
3 pulses/ 74500 sec.
SL1 HVB7 Column 196 Row 2
Preamp voltage 6.3 V
Discriminator threshold 46mV
4/11/12
Strung 63 Field wires through row 17 SL2.
4/12/12
Strung 21 Field wires through row 21 SL2.
Reattached clean room wall and shifted it to allow more room. Before and after pictures to be uploaded soon.
Cosmic counts:
SL1 HVB7 column 226 row 8
803313 pulses/72686 sec
Preamp voltage 4.6V
Discriminator threshold 46mV
4/13/12
Strung 70 Field wires through row 31 SL2.
4/16/12
Shopping List:
power strip
magnetic tray for tools (9.5"x5.5")
small table with wheels (LxWxH = 24"x20"x36")
round metal trash canister (DxH = 5.5"x6")
2 trash canisters for lifts (diameter less than 6")
3 alcohol refill bottles
2 metal crimp pin bowls for lifts (diameter less than 6")
step ladder for bottom stringer
medium plastic storage bin
chain bag for hoist
Strung 84 Field wires in SL2. On row 44 now.
Background counts:
280 pulses/245850 sec
SL1 HVB7 column 226 row 2
preamp voltage 5V
Discriminator threshold 46mV
4/17/12
Strung 91 Field wires.
It was brought to our attention this afternoon, by Dr. McNulty, that we need to keep a separate work log to record who is stringing, clean-room temperatures, etc. We were tasked with creation of a new Excel file for this purpose and will transfer our existing records to this file tomorrow.
Background counts:
6 pulses/62407 sec
SL2 HVB7 column 226 row 8
preamp voltage 5V
discriminator threshold 46mV
4/18/12
Strung 98 Field wires.
Reattached part of the clean room wall that had fallen.
Cosmic count:
107416 pulses/72727 sec
SL2 HVB4 Column 110 row 2
Preamp voltage 5V
Discriminator threshold 46mV
4/19/12
Strung 49 Field wires.
After testing tensions and removing the R2 pretensioner, we noticed two loose wires hanging in the chamber. Both had tension errors within the acceptable range when tested earlier. We pulled the wires out the top and examined them. They appeared to have a crimp mark on the bottom. We retested the gap of both crimpers being used and found that the ones on the bottom were not holding the gauged gap. (Both sets of crimpers had been tested immediately after lunch and before beginning stringing in the afternoon.) We visually inspected the wires we had strung and saw no other loose or hanging wires. Debbie made adjustments to the crimpers and replaced the spring. They appear to be holding their gap now. Marcie cleaned and mopped the clean room floor while stringing was temporarily halted. We are ready to begin stringing again in the morning.
Cosmic count:
84456 pulses/72910 sec
SL1 HVB7 column 226 row 8
Preamp voltage 5V
Discriminator threshold 46mV
4/20/12
Strung 77 Field wires and completed trend testing for this week.
Background counts:
63 pulses/ 71724 Sec.
SL1 HVB7 column 226 row 8
Preamp voltage 5V
Discriminator threshold 46mV
1hour counts:
SL2 HVB1 Column 18 Row 5
-Cosmic 14459 pulses/3600 Sec
-With source 14459 pulses/1502 sec
-cosmic 9363 pulses/3600 Sec
4/23/12
Strung 49 Field wires. Repaired old and soldered new stringing chains.
Background counts:
41078 pulse/ 245104 sec.
SL1 HVB7 Column 203 Row 4
Preamp voltage 5V
Discriminator threshold 46mV
1hour counts:
SL1 HVB7 column 203 row 4
-Cosmic 60014 pulse/3600 sec.
-With source 50681 pulses/3760 sec.
-Cosmic 147677 pulses/3600 sec.
-Cosmic 121966 pulses/3600 sec.
4/24/12
Strung 91 Field wires.
4/25/12
Strung 91 Field wires.