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GatedGrid polarity test for GridLeak

Updated on Fri, 2006-05-12 16:18. Originally created by genevb on 2006-05-11 15:34. Under:
On May 9-10, 2006, a test was performed where we reversed the polarity of the Gated Grid as shown in the top of Fig.3 in the GridLeak Simulations ["inverted" mode] for the west side of the TPC. Here are the results of that test.

Z-dependence

Below are plots of the distortion gap (as measured by track residuals) as a function of Z for normal runs (71290[234]*, 57 files) and test runs with the west GG reversed (71290[56]*, 39 files). Here one can see the slight improvement caused by reversing the polarity. At this time I have no explanation for why the distortion seems to abate near the central membrane (the distorting field should abate because of the boundary conditions, but the distortion is an integral in Z over this field).

Normal:
 West reversed:

West/East Ratio

Using a linear fit to the distortion as a function of |Z| as a measure of the amount of leaked ions (distortion scales linearly with Z and with leaked current), I can take the ratio of the west side to east side to see if anything changed with the test. I find that the test appears to show a visible decrease of about 2-3% in the ion leakage, as seen in the following (normalized) histograms. I had more files available when I made this plot (70 normal, 69 reversed test files), and only fit over the range 25cm<|Z|<150cm.

Gene Van Buren
gene@bnl.gov

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pp200 (2006)

Updated on Thu, 2006-05-11 15:34. Originally created by genevb on 2006-05-11 15:33. Under:

Self-alignment and how to move forward

Updated on Thu, 2006-05-11 15:36. Originally created by jeromel on 2006-05-11 15:32.

Reference

Speaker : Victor, Christine, all


Talk time : 15:20, Duration : 00:10
Status, what is realistic to get from now and then, how to best optimize manpower and time to reach a conclusion on feasability??

It would be really great to be able to show this approach can be

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Calibration adjustment and recent changes

Updated on Thu, 2006-05-11 15:39. Originally created by jeromel on 2006-05-11 15:31.

Reference

Speaker : Yuri Fisyak


Talk time : 15:10, Duration : 00:10

Where are we, are we misisng db entries, what timestamp? Geometry?

Status and readiness of the code

Updated on Thu, 2006-05-11 15:30. Originally created by jeromel on 2006-05-11 15:28.

Reference

Speaker : All


Talk time : 15:00, Duration : 00:10
Are we missing components, are we all ready to go??
  1. Simulation reconstruction?
  2. Real data reconstruction?

SVT/SSD Review Coordination meeting 6

Updated on Tue, 2006-06-06 13:36. Originally created by jlauret on 2006-05-11 15:26.
-00-00
Thursday, 1 January 1970
, at 00:00 (GMT), duration : 00:00
Previous meetings available at
  1. [node:1297]
  2. [node:1540]
  3. [node:1568]
  4. [node:2299]
  5. [node:2298]
TimeTalkPresenter
15:00Status and readiness of the code ( 00:10 ) 0 filesAll
15:10Calibration adjustment and recent changes ( 00:10 ) 0 filesYuri Fisyak
15:20Self-alignment and how to move forward ( 00:10 ) 0 filesVictor, Christine, all
15:40Production samples, statistics, time etc ... ( 00:10 ) 0 filesJerome Lauret

SVT/SSD Review Coordination meeting 4

Updated on Tue, 2006-06-06 09:45. Originally created by jlauret on 2006-05-11 15:18.
-00-00
Thursday, 1 January 1970
, at 00:00 (GMT), duration : 00:00
Previous meeting reference
  1. [node:1297]
  2. [node:1540]
  3. [node:1568]

This meeting was restricted to discuss technical issues and show stoppers we may have had still. Topics included

  • Self-alignment progress / where are we (Victor)
  • Drift velocity (Yuri)
  • track ID issue ? Vertex issue ? (All)
  • Overview of other activities (Spiros)

SVT/SSD Review Coordination meeting 5

Updated on Tue, 2006-06-06 09:48. Originally created by jlauret on 2006-05-11 15:12.
-00-00
Thursday, 1 January 1970
, at 00:00 (GMT), duration : 00:00
Previous meetings are available at
  1. [node:1297]
  2. [node:1540]
  3. [node:1568]
  4. [node:2299]
TimeTalkPresenter
14:30Geometry and Drift calibration status ( 00:10 ) 1 fileSpiros Margetis (KSU)
14:40Self-Alignement discussion ( 00:10 ) 0 filesChristine Nattrass (Yale)
14:50Self-Alignement discussion ( 00:10 ) 0 filesVictor Perevoztchikov (BNL)
15:00Progress forward, missing code components ( 00:10 ) 0 filesAll

GridLeak distortion progress

Updated on Wed, 2006-05-10 10:51. Originally created by testadmin on 2006-05-10 10:51.

Reference

Speaker : Gene Van Buren ( BNL )


Talk time : 12:40, Duration : 00:10

Simulation request for SPin

Updated on Wed, 2006-05-10 10:53. Originally created by testadmin on 2006-05-10 10:51.

Reference

Speaker : Maxim Potekhin ( BNL )


Talk time : 12:50, Duration : 00:10

We would like to take the oportunity of this simulation to use the
Grid infrastructure for the raw simulation pass. We shall review the
sttaus of the request, the size, samples and feasability of this

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TPC Twist calibration progress

Updated on Wed, 2006-05-10 10:50. Originally created by testadmin on 2006-05-10 10:50.

Reference

Speaker : Eric Hjort ( LBNL )


Talk time : 12:30, Duration : 00:10

Opened discussion

Updated on Wed, 2006-05-10 10:49. Originally created by testadmin on 2006-05-10 10:48.

Reference

Speaker : All


Talk time : 12:20, Duration : 00:10

What to do with Cu+Cu samples without B-EMC.

Cu+Cu production, timeline and samples overview

Updated on Wed, 2006-05-10 10:47. Originally created by testadmin on 2006-05-10 10:47.

Reference

Speaker : Lidia Didenko ( BNL )


Talk time : 12:10, Duration : 00:10

News from the front

Updated on Wed, 2006-05-10 10:47. Originally created by testadmin on 2006-05-10 10:46.

Reference

Speaker : Chuck Whitten ( UCLA )


Talk time : 12:00, Duration : 00:10

further pi-Xi purity study - trying to use pi-pi HBT

Updated on Fri, 2006-05-05 09:22. Originally created by petrchal on 2006-05-05 09:22.

Reference


Talk time : 15:40, Duration : 00:10

First attempt of dN/deta scaling for proton correlations

Updated on Fri, 2006-05-05 05:43. Originally created by hbtuser on 2006-05-05 05:43.

Reference

Speaker : Hania Gos ( Warsaw University Of Technology, SUBATECH )


Talk time : 15:30, Duration : 00:10

CuCu200 (2005)

Updated on Wed, 2012-12-19 14:46. Originally created by genevb on 2006-05-04 10:38. Under:
This is a quick look at the performance of SpaceCharge & GridLeak corrections performanc in a test production sample of CuCu200.
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Online status and issues

Updated on Wed, 2006-05-03 12:30. Originally created by testadmin on 2006-05-03 10:06.

Reference

Speaker : Mike DePhillips ( BNL )


Talk time : 12:45, Duration : 00:10
Database rate and save time lag.


Elog changes

Updated on Wed, 2006-05-03 12:48. Originally created by testadmin on 2006-05-03 10:06.

Reference

Speaker : Levente Hajdu ( BNL )


Talk time : 12:55, Duration : 00:05

Xrootd production deployment readiness

Updated on Wed, 2006-05-03 10:55. Originally created by pjakl on 2006-05-03 10:02.

Reference

Speaker : Pavel Jakl ( NPI-AS )


Talk time : 12:35, Duration : 00:10