 Fri Jun 28 14:06:28 2019, Jan, General, CAD of (p,g) setup,
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Wed Sep 25 13:58:24 2019, Laszlo, General, Gamow window energies for 118Te(p,g), 
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# Z A Iso Re Rc T9 upper width mxpos shift
52 118 te118 pg 20 0.5 1.39 0.58 1.06 -0.01
52 118 te118 pg 20 1.0 2.27 1.04 1.69 -0.01
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Fri Feb 21 11:29:02 2020, Laszlo, General, Shift plan,
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| https://docs.google.com/spreadsheets/d/14m8WcCq1erx6HqWJRK7TLbCx121IkjqGa5l-frf4YjI/edit#gid=0 |
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Wed Mar 11 14:33:44 2020, Laszlo, General, beam time manual,
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| Here you can find the digital version of the E127 beam time manual. |
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Tue Mar 17 08:15:49 2020, Jan, General, current grids & screen in TE ,
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| measured beam diagnosis with 124Xe48+ at 326 MeV/u |
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Wed Mar 18 09:53:28 2020, Laszlo, Jan, General, vacuum after opening gate valve,
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Gate valve to DSSSD setup was opened on Tue 17.03. ~9:00
The vacuum on Wed 18.03. ~9:00 was
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Thu Mar 19 09:43:28 2020, Laszlo, General, Status of the ESR,
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After two days of tuning the beam, yesterday evening (~8pm), it was found out that within one ESR pattern using the new control system the harmonics of
the cavities cannot be changed. This gives us a fatal limitation, that we cannot go lower
than 10MeV/u with the beam energy.
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Thu Mar 19 15:09:29 2020, Jan, General, starting off with DSSSD,
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here is my short guide how to start with the measurement as soon as we have a beam available.
0. ESR timing in DAQ (maybe Uwe can also assist here)
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Thu Mar 19 19:14:40 2020, Laszlo, General, primary beam measurement,
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Now our aim is to decelerate the primary beam (naked 124Xe) down to 10MeV/u. At this energy we can test our detectors and that how the scraping works. In
addition, in the E108b experiment, 124Xe(p,g), there is no measurement point at 10MeV/u. |
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Thu Mar 19 23:48:56 2020, Laszlo, General, 124Xe primary beam at 10Mev TargetOFF,
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Beam lifetime is estimated to be 11sec at least (hard to.see with the cursor the corrct values on the shottky monitor)
but Yury says it is even
~20sec. The particle njmbers are on the attached picture, however at 10Mev the cirrent measurement is not.really
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Fri Mar 20 01:11:58 2020, Laszlo, General, Target - beam jntersection,
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We have managed to find the target position with the beam by looking at the xray spectra. The trick was that at 10mev we
only have a low increase in the xray rates, so.we went for 400Mev/u where the rate change was dramatic (see in the
picture) |
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Fri Mar 20 01:21:00 2020, Laszlo, General, target is switched on event based,
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Fri Mar 20 01:36:48 2020, Laszlo, General, 124Xe primary beam at 10Mev TargetON,
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We didmt see any effect on the lifetime if the target is switched on. It is because we use only hydrogen target (but why
is.it so?) |
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Fri Mar 20 16:48:00 2020, Laszlo, General, flipped Si shaper output in x and y,
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Yesterday evening we have found out that the energy signals from the silicon are negative --> wrong polarity of the shapers was chosen while using the jumpers.
Cables coming from the preamp are switched now. --> in the recorded data the X and Y coordinates of the Si strip detector is the other way around!
Hopefully, the left and right side we can judge well... |
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Fri Mar 20 22:51:36 2020, Laszlo, General, Target on signal change,
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From the previous settings:
JetOn
mashine number 11
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Fri Mar 20 22:54:30 2020, Laszlo, General, First view of the beam,
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Intensity from Sis 1.7E9
The intensity is too.low at ESR to be visible. However we could.catch it somehow with Shottky (picture below) |
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Fri Mar 20 23:43:26 2020, Laszlo, General, Vacuum while moving in the detector at yesterday evening,
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Vacuum before DSSSD movement: 1.5844E-11
Top value after movement: 3.64378E-11
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Sat Mar 21 01:25:07 2020, Laszlo, General, Vacuum while moving in the detector for fragment measurement,
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Stayed below E-10
Start:2.42E-11
Top after moving: 4.144E-11 |
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Sat Mar 21 01:44:57 2020, Laszlo, General, ,
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| from the SIS side they could optimize the intensity. we gained a factor ~3. Now the SIS intensity is at |
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Sat Mar 21 02:36:44 2020, Laszlo, General, detector and scraper position,
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For the 124Xe primary beam measurement:
-with the DSSSD we scraped the beam at position -40
-position of the detector is set to -25. (1.5cm away from the beam)
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