December 8, 2010
Phone bridge : number 617-324-7374, time 5pm to 6:30pm , 10 lines
Present:
Agenda:
- Status of papers from run 9:
- W AL
- W x-section
- Preparation to run 11
- Goals
- acquire LT=100/pb w/ P=50% to tape
- plot J-peak charge separated 1 month after W-trigger established
- determine AL for W+,- in the Barrel and Endcap
- publish only AL for Ws , not necessary in PRL
- do not yield to the pressure of upcoming conferences, rather do the job once and do it right at the first time.
- timing in of calos & spin bits
- L0 trigger
- L2 tagger
- online monitoring
- human run QA concurrent with data taking
- revise key words describing problems
- generate automatic run list
- assign names for human QA, define stick and carrot
- preparation to daq files production : A='dirty' , B='preliminary', C='final' (w/ support from Jerome)
- time line: 'near real time', 'end of May' 'December'
- availability of TPC calibrations : '2mm', 'as good as in run 9', 'final'
- availability of computing resources: Magellan/Cloud for A,B, RCF for C
- availability of disks for muDst : it is ~50% on us, 50% on RCF
- availability of manpower to harness the cloud: Matt,Jan, Iwona, Justin
- do we need changes/upgrades to the BFC to better utilize Endcap info for tracking?
- Low priority issues (work on those after all the above is in a good shape)
- ZB events & embedding
- Z-> ee x-section
- vernier scan
- Goals
December 1, 2010
Phone bridge : number 617-324-7374, time 5pm to 7pm , 10 lines
Present:
Agenda:
- [Dip problem resolved?|http://drupal.star.bnl.gov/STAR/blog/seelej/2010/nov/23/a-resolution-dip-problem-pp500] - Joe
# [First look at endcap Ws|http://www.star.bnl.gov/protected/spin/stevens4/tmp/nov22/endcapW.pdf] - Justin
# Embedding and Production Update - All
# [more about Endcap Ws Ws |http://drupal.star.bnl.gov/STAR/system/files/2009-W-Endcap-varia1.pdf]h4. November 9, 2010
Phone bridge : number 617-324-7374, time 5pm to 7pm , 10 lines
...
- TPC, Gene:
- non-linear SC(lumi) should provide TPC track accuracy of 2 mm at both ends of the track. We hope Joe will work on this next week, should take a week.
- We could also use Gene's PCA method of finding a linear combination of scalers (each at first order).
- since linear SC(lumi) was tuned to lumi equivalent to ZDC base rate of 70kHz, any pp500 run taken at the ZDC rate has current best TPC calibration. Jan: I'll use it for beam line constrain study, see below.
Wiki Markup *beam line constrain* : plan A is Rosi & Jan succeed with 3D beam line fit to global tracks w/o intermediate vertex finding. Here are \[[Media:Beamline-v3.pdf |details of the algo]\] as intended and not implemented. If this works Gene needs a \~day to produce beam line constrain for all 39 fills. Plane B is to use Minuit vertex finder which may require significant stats to overcome jitter due to pileup tracks. In such case we would need to provide manpower for \~week long job, Gene would only supervise it. Jan: lets go for plan A.
- conclusion: once both items are resolved we can ask for production, perhaps 2 weeks from now.
- BTOW, ETOW gains - no progress.
Wiki Markup BSMD : Willie is working '''slopes for individual strips'''. He run over 10k VPD-minB events and got this \[[Media:BSMD-strips-Picture 16.png|2D plot of module 119]\] and spectra \[[Media:BSMD-strips-Picture 15.png |individual strips]\]. The available 1.5M vpd-minB events should be enough to fit every strip. If not we will merge strips.
Wiki Markup BSMD geometry: Scott asked how well we know '''relative position of BSMD vs. TPC'''. It is [followed up on emc2-hn |http://www.star.bnl.gov/HyperNews-star/get/emc2/3250/1.html]. <p> Scott once did \[[Media:Conversions-distace-Scott.pdf | simple calculation for photons that convert to e+/e- pairs||||||||||||||||||||||||||||||||||||||||||||\||]\] in the SVT, attached. <br>The relevant equation is on the bottom left. For the W -> e, we have r_1 = 0, r_2 = 2.3 m (approximate radius of BSMD planes), and B = 0.5 T. With these numbers, you get the simple relation<br> dPhi (cm) = 40 / pT (GeV)<br>For example, an electron of 40 GeV pT will deflect in the phi direction by 1 cm relative to the same e- of infinite pT. This is probably good to better than a few %.- run QA : Scott is working on his fills.
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