Run Plan for Week of
17 Nov to 23 Nov 2004

Maintenance Day 17 Nov 2004

The TEC will stay in until Thurday 17 November early morning
The aperature will stay in until very early Sunday morning (can Grant or someone else be trained to do this?)

Evening and Graveyard Shift 17 to 18 Nov 2004

Load High rate tune (nominal 29.6MeV/c tune, with F0=24mm by 80mm) http://twist.triumf.ca/private/online/nominalsettings.txt
Note that the Q6 DAC setting might need to change because of steering! First we need to figure out how the quad steering works, ie find the new DAC setting of Q6 to get back the nominal DCT current(5 minutes)
Take a run with detector and TEC on (about 15 minutes)

The idea here is to do a bunch of Q6/B2/F2Slit position scans that can be studied offline to see if there is a setting of these that can bring the beam in both with zero angle, and on axis (horizontally at TEC, which turns out to be vertically at PC1,2).
We will do this with the collimator in for two reasons:

We don't want to lose the hour of beamtime
Since we want to find the setting that brings the beam in at zero angle and zero position, the collimator helps us narrow down the possibilities (it should be reasonably well centered)

We may as well collect these scans with both TEC and detector to get as much information about the beam as possible, and put in foil degrader at position (10 thou of Mylar) 8 to stop in the sparse stack to get better information from the muon range.
Now need to find a useful range of settings on Q6 steering to sweep from 15% to 100% to 15% on the others side of maximum M rate -- hopefully this is a pretty quick check (15 minutes)
So for each of these B2 settings: 938.0G, 940.0G, 942.0G, 944.0G, 946.0G, 948.0G, 950.0G, collect runs of about 10 to 12 minutes each for each of the these Q6 steering settings: ~20% max M rate (left), ~50% max M rate(left), ~100% M rate (center), ~50% max M rate(right), ~20% max M rate (right). Each B2 setting will take about 1hour, so the entire sweep will take about 7 hours.
Repeat the above sweep but change F0 horizontal position = 0.0 mm instead of our nominal of -5.0mm (another 7 hours).
These are likely to need two people on shift, so Dave agreed to help with the evening shift, and Blair will come in for the graveyard shift

Remove the TEC with non magnetic tools, but leave in the aperature.
Take out the foil degrader (back to position 0).
Take a low rate set (actually this will be another "high rate" with aperature set which gives us a low rate)

Load High rate tune if it isn't still already tuned (nominal 29.6MeV/c tune, with F0=24mm by 80mm) http://twist.triumf.ca/private/online/nominalsettings.txt
Make sure all of the slit positions are correct (note F2HP=-5.0mm)
M rate with "high rate" and aperature is about 1400 for 100 muA primary beam current
Since we already have an aperature data set stopping slightly downstream, take this data set as centered in target
Take runs monitoring stopping z from history qod, and adjust stoppingZ regulator to -0.75, you may need to manually adjust He/CO2 from uBeam on statusbar to get within +/- 0.02
Take >300 runs at this setting... expect it will take until Sunday morning

We have a full set of these already, but it is before we had stoppingz regulation so it ended up slightly upstream!

Load nominal tune (F0=18mm by 60mm) settings are found here: http://twist.triumf.ca/private/online/nominalsettings.txt.
Since the previous set was also centered in target probably don't have to adust anything, just check that stoppingZ regulator is set to -0.75 and that first few new points in history qod stoppingz (when running) are around this value.
Take > 300 runs at this setting... expect it will run until maintenance day on Tuesday 23 Nov 2004.

Date: 2004/Nov/26 23:00 Who: Blair Jamieson