From Glen Marshall, Elog
http://midtwist.triumf.ca:8081/EL/021010.12274?exp=twist

I've measured some rates after setting the F0V vertical jaws. The results
are (at about 144 muA BL1A):

Set	Measured		M rate	T1ION
mm	(+/- 0.2, est.)		/s	/s

6	6.2			1400	11600
7	6.9			1680	11526
8	8.3			2480	11525
9	9.0			2725	11553
10	9.8			3200	11500
11	11.0			3780	11530
12	11.8			4420	11527

These were made with F0H=41mm, F1H=10mm, F2H=20mm approx. (+/- 1mm), at 29.6
MeV/c.

I have left it at about 8.0 mm, to give a rate of about 2300 /s.

It may be that the rate difference can be explained by slightly different
slit or jaw settings. F0V was about 9.8 on a rough eyeball average of the
readback (although I tried to set it back as close to 9 mm as possible on
maintenance day).

The procedure I've used is as follows.

1. Adjust the slit to a lower value by a few mm (if possible! minimum
setting for F0V is 6 mm).

2. Set desired value, enter, then click "move".

3. After it has stopped moving again, click "move" again.

4. Repeat 3 until no apparent change takes place (in readback position or if
possible, in rate of M counter).

5. If readback is consistent with what you entered, ok. If not, go to 2 and
repeat with a slightly modified number.