Difference between revisions of "September 14, 2011 Tracking CDC/FDC"
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# FDC Update [http://wwwold.jlab.org/htbin/PHYSICS/halld/enote112.pl logbook] | # FDC Update [http://wwwold.jlab.org/htbin/PHYSICS/halld/enote112.pl logbook] | ||
# CDC Update | # CDC Update | ||
+ | ## Prototype results with cosmics | ||
+ | Drift time histogram (for all straws) and expanded about t0 | ||
+ | {| border="0" cellpadding="2" | ||
+ | |width="450pt"| | ||
+ | [[Image:run_31710_drift_all.png|thumb|450px|Drift times]] | ||
+ | |width="450pt"| | ||
+ | [[Image:run_31710_drift_all_z.png|thumb|450px|Drift times]] | ||
+ | |} | ||
+ | T0 was taken as the x-intercept of a straight line fitted to the leading edge over 10% to 90% of the maximum value. Here (hit threshold=5sigma) this value is 91.3ns. | ||
+ | <br> | ||
+ | 50/50 Ar/CO<sub>2</sub> results at 2050V | ||
+ | {| border="0" cellpadding="2" | ||
+ | |width="300pt"| | ||
+ | [[Image:run_31710_4951_tz11_tfix1_thr4_res20_xchunka.png|thumb|300px|49/51 Ar/CO2 gas mix 2050V Resolution vs fitted drift distance, hit thr=4sigma dt=10ns tfix=1ns]] | ||
+ | |} | ||
+ | {| border="0" cellpadding="2" | ||
+ | |width="900pt"| | ||
+ | [[Image:run_31710_4951_tz11_tfix1_thr4_res20_xchunkc.png|thumb|900px|49/51 Ar/CO2 gas mix 2050V Resolution vs fitted drift distance, hit thr=4sigma dt=10ns tfix=1ns]] | ||
+ | |} | ||
+ | 50/50 Ar/CO<sub>2</sub> results at 2100V | ||
+ | {| border="0" cellpadding="2" | ||
+ | |width="300pt"| | ||
+ | [[Image:run_31715_4951_tz9_tfix0_thr4_res20_xchunka.png|thumb|300px|49/51 Ar/CO2 gas mix 2100V Resolution vs fitted drift distance, hit thr=4sigma dt=9ns tfix=0ns]] | ||
+ | |} | ||
+ | {| border="0" cellpadding="2" | ||
+ | |width="900pt"| | ||
+ | [[Image:run_31715_4951_tz9_tfix0_thr4_res20_xchunkc.png|thumb|900px|49/51 Ar/CO2 gas mix 2100V Resolution vs fitted drift distance, hit thr=4sigma dt=9ns tfix=0ns]] | ||
+ | |} | ||
+ | Looking for afterpulses at 2100V with cosmics: | ||
+ | {| border="0" cellpadding="2" | ||
+ | |width="450pt"| | ||
+ | [[Image:run_31715_events.png|thumb|450px|Events at 2100V]] | ||
+ | |width="450pt"| | ||
+ | [[Image:run_31715_eventsz.png|thumb|450px|Events at 2100V (zoom in on pedestal)]] | ||
+ | |} | ||
+ | |||
+ | More details on [[Improved_timing]] | ||
== Minutes == | == Minutes == |
Revision as of 10:55, 14 September 2011
Meeting Time and Place
Wednesday September 14, 2011 at 11:00am At Jefferson Lab, the meeting will be held in F326
Connections
To connect from the outside, please use ESNET
- ) ESNET: 8542553
- )To connect by telephone, dial:
- You can look up toll-free number at http://www.readytalk.com/intl
- US and Canada: (866)740-1260 (toll free)
- International: (303)248-0285 (toll call)
- enter access code followed by the # sign: 3421244#
Agenda
- Announcements
- Collaboration Meeting
- CDC status talk
- FDC status talk
- Other talks? 125FADC?
- FDC Update logbook
- CDC Update
- Prototype results with cosmics
Drift time histogram (for all straws) and expanded about t0
T0 was taken as the x-intercept of a straight line fitted to the leading edge over 10% to 90% of the maximum value. Here (hit threshold=5sigma) this value is 91.3ns.
50/50 Ar/CO2 results at 2050V
50/50 Ar/CO2 results at 2100V
Looking for afterpulses at 2100V with cosmics:
More details on Improved_timing