Linda R. Coney – 24th April 2009

MOM Update

Linda R. Coney

14 September, 2009

Linda R. Coney – 14 Sept 2009

Outline

Target Taking Data/Operations Documentation Electrical Continued Run Plan …..

Linda R. Coney – 14 Sept 2009

Target Operations & Data Taking

Ran 8 hours Tues, 10 hours Thurs, & 14 hours Sat Used 23,500 target pulses Target operation studies

Searching for ideal timing wrt ISIS cycle Searching for ideal depth into beam Studies with ISIS running at 50 Hz Took data with modified cap bank voltages

Beam loss vs Particle Rate study Fix target timing and adjust dip depth Take data at 100 mV, 200 mV, 300 mV, 400 mV, 500 mV beam losses

Pion beam at 333 MeV/c Positron beam at 150 MeV/c Pion to Muon beam at 252 MeV/c

Linda R. Coney – 14 Sept 2009

Target Operations

Beamloss (in Sector 7) for the entire run Note that there does seem to be two distinct peaks although Paul has

only fitted a single gaussian.

Linda R. Coney – 14 Sept 2009

Target Operations

Shows that the previous double peak effect is not due to the target, remember that the target usually shows a characteristic double peak structure due to the inhererent 0.15mm position resoulution and the exact pulse by pulse capture position. The theory is that this is a real effect due to the ISIS beam wandering about in a cyclic (and repeatable) pattern. There was no change in the delay setting over this period.

Linda R. Coney – 14 Sept 2009

Target Operations

The plot shows the Beam Centre Distance of the target over time for the entire Saturday shift. The double peak effect can be clearly seen but the important point is that the target was absolutely stable over this prolonged run period. Also the higher points at the beginning and end of the run are when the target was lowered and raised respectively.

Linda R. Coney – 14 Sept 2009

Recent Data

Run 972 Sept 10 2009 pion beam 333 MeV/c with 500mV losses

protons

Linda R. Coney – 14 Sept 2009

Recent Data

Run977_Sept102009_piBeam333MeVc_400pulses

Linda R. Coney – 14 Sept 2009

Recent Data

Run1006_Sept122009_pimuBeam336.85-256 MeV/c 120 pulses

Linda R. Coney – 14 Sept 2009

Operations

Updated documentation about 90% done Still need a few updates

Some trips of beamline magnets DAQ having some trouble with new fADCs

Possible fix this weekend “invalid” alarms constantly going off on alarm handler extremely

taxing/annoying Electrical

Linda R. Coney – 14 Sept 2009

Next

Run Plan for this week: Commission Decay Solenoid

Set beamline to pion optics Scan through decay solenoid current settings Calibrate B field by comparing to simulation Look at beam profile in FNAL detectors and TOF0, TOF1

Optimize Upstream Beamline Marco and Chris Rogers Optimize Q1-Q3 Move quads to maximize rates in detectors