| ID |
Date |
Author |
Category |
Subject |
|
154
|
Wed Jun 30 14:48:54 2021 |
Oliver | General | Data taking - and not... |
We just started data taking. But a few minutes later the main experiment needed to do some adjustements to the beam. This interrupts us for a couple of minutes... |
|
153
|
Wed Jun 30 13:57:14 2021 |
Yuri, Sergey | Accelerator | sextupoles + scraper positions |
After setting up on 70Se
Sextupoles were adjusted to optimize the resolution of the 70Se peak. Set values are in the ESR logbook.
The SIS energy was shifted up to increase the number of 70Se.
Esis original = 445.68 MeV/u
Esis now = 451.68 MeV/u (+6 MeV/u)
See attached pictures
scrapers:
GE01DS_HI = -58mm
GE01DS_HA = +130mm (fully open)
GEEXDD2_S = -0.5mm
GEEXDS2HA = -11.2mm |
|
152
|
Wed Jun 30 13:05:08 2021 |
Rui-Jiu Chen | Analysis | ID of 70Se |
This is the latest ID of 70Se setting. |
|
151
|
Wed Jun 30 13:04:40 2021 |
Shahab | Runs | 245 Amplifier on |
turned on extra 20dB amplifier for the 245 Resonator around 12:32 |
|
150
|
Wed Jun 30 12:35:53 2021 |
Rui-Jiu Chen | Analysis | Change reference level to -20dBm. Turn of amplifier. |
SC_2021-06-30_12_35_52
IQ_2021-06-30_12_35_43
Reference level=-20dBm |
|
149
|
Wed Jun 30 12:26:58 2021 |
Rui-Jiu Chen | Analysis | NTCAP start. |
SC_2021-06-30_11-00-12
IQ_2021-06-30_11-00-12
reference level -80dBm.
Amplifier is off. |
|
148
|
Wed Jun 30 09:04:50 2021 |
Yuri, Markus | Accelerator | Status |
1) Over night the source was conservated. It is being restarted now.
2) The approximated amount of Gas in this bottle shall allow for running until tomorrow morning (~24 h). There is still another bottle in reserve (1 l) and one reserve from GANIL (0.5 l).
3) Beam-time coordinator suggests to run until the gas is over, i.e., up into the weekend. |
|
147
|
Wed Jun 30 08:59:37 2021 |
Yuri | Accelerator | 70Se setting |
X(9Be)=1.815 g/cm2 (adjusted in primary beam setting)
Gamma_t=1.3956
E(70Se)=368.499 MeV/u
Br(70Se)=6.21993 Tm
Pre-drilling:
E(78Kr)@Br(70Se)=337.461 MeV/u
E(SIS) = 415.792 MeV/u
Fragment Setting:
E(SIS) = 445.68 MeV/u |
|
146
|
Wed Jun 30 02:12:46 2021 |
Shahab | Runs | still no beam in ESR: quadrupole magnets are down |
still no beam in ESR: quadrupole magnets are down |
|
145
|
Wed Jun 30 01:38:20 2021 |
Shahab | Runs | beam is back from Linac but not in the ESR |
|
|
144
|
Wed Jun 30 00:20:10 2021 |
Rui-Jiu Chen | Analysis | ID of 70Se setting on May |
This is an old spectrum which was recoded on May. |
|
143
|
Wed Jun 30 00:12:55 2021 |
Rui-Jiu Chen | Analysis | the ID of 72Ge setting |
|
|
142
|
Tue Jun 29 21:15:01 2021 |
Kanika, Shahab | Runs | lost beam problem Unilac |
cooling water in UNILAC is out |
|
141
|
Tue Jun 29 21:12:15 2021 |
Kanika, Shahab | Runs | Moving the resonance frequency of the 245 MHz resonator |
moving in the plungers:
before: 400
after: 200 |
|
140
|
Tue Jun 29 21:10:30 2021 |
Shahab | Runs | 72-Ge setting |
the new setting is roughly 400 khz lower in frequency.
Previous beam time Ge was on 243.100 now it is on 242.74
we decided to use the higher harmonic:
expecting it on 244.66 MHz |
|
139
|
Tue Jun 29 20:40:55 2021 |
Rui-Jiu Chen | DAQ | start NTCAP |
Carrier Frequency:245MHz.
IQ rate 20MSamples/s
Reference level:-90 dBm
SC_2021-06-29_20-38-27
IQ_2021-06-29_20-38-27 |
|
138
|
Tue Jun 29 20:13:58 2021 |
Helmut, Sergey, Yuri | Accelerator | change to predrilling an 72Ge |
After optimisation of sextupoles we found a scraper position which makes a narrow peak and keeps 20% of the injected beam.
GEEXDS2HA = +2.0 mm (out is +130mm)
GE01DS_HI = -75 mm (out is -130mm)
removed scrapers again for predrilling.
We agree on gamma_t = 1.3956, E/m = 368.50 MeV/u.
Then for 78Kr at Brho = 6.79675 Tm of isoc 72Ge
E-SIS = 466.63 MeV/u, assume target of 1815 mg/cm² Be
after target E/m = 393.024 MeV/u
In ESR-Modi set for same E/m but different m/q (m=72, Z=q=32)
Injection looks good like before with isochronous 78Kr we go directly to the next step
72Ge with E-SIS = 440.16 MeV/u to get 72Ge at gamma_t. |
|
137
|
Tue Jun 29 10:32:10 2021 |
Sergey, Helmut | Accelerator | cooler curves for tuning of isochronicity |
Variation of quadrupole E01QS03D to change gamma_t in isoc. mode
measured with 78Kr at 368.5 MeV/u on 28.06.2021 evening.
The shape of the three curves looks very similar they would only require a different beam velocity.
But I suppose we stay with the value close to the old one (gamma_t ~ 1.3956). |
|
136
|
Mon Jun 28 18:32:49 2021 |
Ruijiu, Shahab | DAQ | trigger signal connected to NTCAP and analyzers |
|
|
135
|
Fri Jun 25 21:47:24 2021 |
Yuri | Analysis | Identification |
Attached are two files with a proposed particle identification.
Different colors indicate different harmonic numbers |