 Tue Apr 8 23:08:15 2025, Sergey Litvinov, Xinliang Yan, General, Tuning of the ion optics 
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From roughly 10:45 pm to 11:05 pm, Sergey tuned the
ion optics of the ESR to see if the mass resolution at
413.55735 MHz improves or not. Please note that the
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Mon Apr 7 13:18:27 2025, Jelena, Guy, General, Tuning
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| Beam was gone at 13:04 due to fragment tuning. |
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Tue Apr 1 03:50:12 2025, Shahab, Yue, Carlo, Zac, Esther, Michael, DAQ, Tuners of the both cavities set
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410 MHz cavity resonance frequency tuned. motors both on 50 mm
245 MHz cavity resonance frequency tuned. motors both on 390 mm |
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Tue Apr 8 13:46:20 2025, Michael , General, Trying new Sextupole settings, all data after 13:44 affected
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Mon Mar 31 10:46:43 2025, Ruijiu Chen, Analysis, This program is used to combine spectrum which is recored by RSA into one spectrum.
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This program is used to combine spectrum of many injections into one spectrum.
Example of usage:
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Wed Apr 2 17:46:12 2025, Ruijiu, Wolfram, Xinliang, Wangqian, Analysis, The spectrum of 194Pb82+ vs 184Pt78+
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In summary, the statistical results collected between 5:00 and 12:00 AM on April 2, 2025. For each injection, we calculate the frequency mean value
(f_mean) and the peak height (P) of 194Pb ions for frames with t > 0.14 s, correct each injection’s frequency by subtracting f_mean, and only sum
the
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Tue Apr 1 16:47:32 2025, Ruijiu, Jan, Shahab, Analysis, The frequency of 194Pb82+ is changed to 408.600 MHz
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Tue Apr 1 14:25:21 2025, ruijiu , Analysis, The frequency of 194Pb82+ has been changed from 408.606MHz to 408.602MHy during last 12 hours 12x
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| The following images display the frequency spectrum at the start of every hour from 3:00 to 14:00. |
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Tue Apr 1 02:03:33 2025, ruijiu, Analysis, The frequency of 194Pb82+ has been changed from 408.522 MHz to 408.637 MHz
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this is the new setting after we lost the old one.
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Wed Apr 2 11:09:42 2025, Michael, Alex, Accelerator, The beam is back in the ESR
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We have the beam again the ESR since around 11:00.
The Schottky spectra look the same as before.
The ESR experts could not exactly identify the problem which caused this loss of the beam. |
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Wed Apr 2 10:31:15 2025, Michael, Alex, Accelerator, The beam is back from 10:10
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Wed Apr 2 07:39:41 2025, Michael, Alex, General, The beam is back at 07:35
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Wed Apr 2 08:47:27 2025, Michael, Alex, General, The beam is back
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The beam is back. But, the experts have found a problem with one of the modules of the SIS kicker magnet. And, currently they have disabled this module.
This fixed the problem. However, since the kicker system is not running with full power, it is not clear by how much this can affect the extracted beam
intensity for the ESR. Therefore, the ESR experts have been called and they will look at the injected beam intensity in the ring, in order to know if |
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Wed Apr 9 11:09:48 2025, Wolfram, General, Thanks to everybody for their committment to perform this experiment
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Tue Apr 1 10:03:56 2025, Jelena B, Siddharth, General, Technical issue with SIS18
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| From HKR info: there is a technical issue with SIS18 and we will have no beam for next 25 minutes. |
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Thu Apr 3 09:43:14 2025, All, Accelerator, Stop 194Pb, switch to 208Pb82+
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The repair of SIS electron cooler power supplies
In the meantime we received a few injections and confirmed that 194Pb setting is still as it was before entering into the ESR
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Wed Apr 2 15:07:52 2025, Michael, Alex, Maeve, Accelerator, Still not a good beam in the ESR
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The (power supply of) SIS kicker magnet has been repaired and the beam has been restored from about 14:20.
But, the Schottky spectrum in the ESR looked pretty bad, so the measurement can not be restarted.
The accelerator experts are currently looking into this problem. |
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Wed Apr 2 18:22:30 2025, ID, General, Spill cycle distribution
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The spill cycle distributions is absolutely nuts since beginning of the shift. On the positive side: we got a lot of spills since FRS did not take many,
so I think we got more than our parasitic 1:10 share... |
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Sun Apr 6 20:49:25 2025, Ruijiu Chen, Analysis, Spectrum during April 6 20:00- 20:19
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Wed Apr 2 12:13:57 2025, Michael, Alex, Accelerator, Some empty injections triggered while beam patterns are changed
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Operators seem to play with spill cycles, we get every 1:1 shot, then 1:10 again. During this, we noticed a few "empty injections" beeing triggered in the
RSAs. They light up green, but spectrum is flat. Then it returns to normal operation again. |
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