CHIPS IAC Run 5-28-08
Delay from gun is about 400 ns gate width between 400 and 800 ns
Tune 4 MeV electrons into Experimental Cell
Optics elements 45Q2, Bend2, L90Q1m L90Q2 are after the tungsten converter.
|Gun HV||20 kV|
Here is an image of the transmission. Channel-2 minus Channel-4 (FC - flange).
Zero Degree Port.
Beam spot at the Zero Degree Port as a function of grid voltage knob setting -- not calibrated to voltage but reproducible. (Settings: 0.1, 0.15, 0.18, 0.2)
The 0.15 grid setting is nice. It does not saturate. Here we take slices in x and y and then fit gaussians to the intensity curves. We observe that 35 mm is 244 pix by comparing with the 3.5 cm distance between diagonal bolt studs.
renders the standard deviation into mm. The FWHM is . For the slices mm and mm. This is fully consistent with our digital photographs taken on May 27, 2008.
90 Degree Port.
The runs below had about 40 mA peak before the first 45 degree bend.
|Run #||MPA file name||W||Ta||Description|
|6||NaI006.mpa||NA||NA||Background measurement, no source|
|7||NaI007.mpa||NA||NA||Na-22 source on top of NaI detector|
|8||NaI008.mpa||NA||NA||change spec amp gain from 500 to 200|
|9||NaI009.mpa||NA||NA||Co-60 source on top of NaI, Na-22 removed, Spec amp gain back to 500|
|10||NaI010.mpa||NA||NA||change spec amp gain from 500 to 1000, put Na-22 and Co-60 on top of Nai|
|11||NaI011.mpa||IN||IN||ADC free running, change spec amp gain to 500, took out sources|
|12||NaI012.mpa||IN||IN||ADC gated with Gun, change spec amp gain to 500, took out sources|
|13||NaI013.mpa||IN||IN||Start Time: 13.27, Stop Time: 14:06|
|14||NaI014.mpa||IN||Out||Start Time: 14:08, Stop Time: 14:37|
|15||NaI015.mpa||IN||Out||Install 1kG sweep magnet (electrons sweeping up or down, , Start Time: 14:49, Stop Time: 15:19|
|16||NaI016.mpa||IN||In||Install sweep magnet (electrons sweeping up or down, , Start Time: 15:20, Stop Time:|