Meeting 4-1-2017¶

Date: 4th Jan 2017
Time: 15:00 UK time
Attendance: Paul, Melissa, Ed, Durga, Chris H, Ken, Chris R.
Apologies:

Agenda and Minutes¶

Prev Actions:
Action: Adam will send test code to Ed -DONE
Action: Chris will provide the means to run MC to Ed -DONE
Action: Ed to run MC and then look at ideal helix reconstruction - TBC
Action: Paul and all to look at Adams code and run with unit test. - DONE, an error is now fixed, but more to understand.
Action: Ed to add radius as a func of z and phi/z -TBC
Action: Melissa to contact Sumitomo UK and find lead time on a repair on a failed cold head in an emergency, (2-3 days to warm and 2-3 days to dry which must be added to the lead time). -TBC
Action: Ed, Spare Boards still need temp on RH boards and bias calib on LH boards. Will do it in a week in January.

New Actions:
Action: Ed to run MC and then look at ideal helix reconstruction
Action: Paul and all to look at Adams code and run with unit test with error corrected.
Action: Ed to add radius as a func of z and phi/z
Action: Melissa to contact Sumitomo UK and find lead time on a repair on a failed cold head in an emergency, (2-3 days to warm and 2-3 days to dry which must be added to the lead time).
Action: Ed, Spare Boards still need temp on RH boards and bias calib on LH boards. Will do it in a week in January.

Data Taking Summary MAU, EO, PK, AD¶

http://www.hep.ph.ic.ac.uk/~mgeorge/Files/2016MICEData/

• Reconstruction of real data MAU
• What can we tell with field PK
• MC data comparison CHeidt and EO, MAU

Efficiency DS Round table discussion,¶

(From Last time: It looks as though there are 7% US and 15% DS 5 spacepoint tracks (doublets (20% DS) and triplets) that are not reconstructed. This seems to be happening in Pat rec (hence Kalman never gets the tracks from pat rec) and is more prevalent at low momentum. //Looking at Pat rec loosening the circle cut makes no difference, loosening sz (distance travelled around the circle a straight line a s function of z) cut makes a big difference. //Pat rec makes a circle cut to contain 5 spacepoints in a circle, then calculates how many rotations a track has made through the tracker, then makes a straight line sz fit. It is this rotations code that is not working well. Adam has never been able to find a good solution. Adam has sent the code that has the problem ~100 lines using ratio of distance between tracker stations ratio of turning angle (angle of a clockface) between spacepoints. Even in ideal magnetic alignment it doesn't work well.)

Adam has tightened the sz cut and Ed is investigating this, he sees some improvement but not much. We are also still not sure why this problem is on the sz cut. 10mrad rotation observed and this is excluded.

Is field non-uniformity a part of the problem and how much is it? Chris R has sent some back of the envelope calculations which suggest it could be 10% Ken does not agree it is at that level.

Need to look at Adams data file, trims on trims off data and Victoria's data.

Francois, has taken a look at the alignment again there is some confusion with his results downstream... Also pat red does not agree.

Will have another meeting on Fri 1pm this week to discuss

Descoped cooling Tracker design AD¶

Work ongoing

Status of spares: EO CMW

• cold heads and boards

2. Software: PK, AD, CHunt, CHeidt¶

• Performance and Analysis
• Validation script
• Geometry,
• Calibrations, Configurations
• Monte Carlo
• Pattern Recognition
• Kalman
• Online Displays

AoB
Next meeting 18th Jan.¶

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