ID |
Date |
Author |
Category |
Subject |
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 |
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 |
209
|
Fri Jul 2 13:10:00 2021 |
Yuri | Accelerator | Scrapers |
12:46 moved the TOF detector scraper back to -11 mm |
214
|
Fri Jul 2 16:14:17 2021 |
Yuri | Accelerator | Scrapers 4 72Br |
Starting 15:15
The scrapers are moved very much close to each other to eliminate all background particles and leaving basically single ions injected for 72Br. Do not wonder, this means that also many empty files are created.
Scrapers:
E02DS3HG -> -40 mm
EEXDS1HG -> +5 mm
EEXDS2HA -> 0.0 mm
One sees probably a decay of 100 keV isomer, see the attached figure at about 18 s
We will run a few hours with this setting |
220
|
Fri Jul 2 20:33:44 2021 |
Yuri | Accelerator | 70Se setting with closed scrapers |
We tune back to 70Se.
The scrapers stay closed at EEXDS2HA=0 mm, EEXDS1HG=+5 mm
"Single"-particle run |
16
|
Thu May 6 21:26:02 2021 |
Yuri et al. | Accelerator | Energies |
gamma_t = 1.3955
Br(72Ge) corresponds to 6.79575 Tm
E (Kr) at Br(72Ge) = 392.9 MeV/u
ESIS = 467.45 MeV/u (pre-drilling, after 1.8 g/cm2 target)
ESIS = 440.98 MeV/u (final energy for 72Ge)
-during setup, a 20 mm offset in the TE line was observed. Beam centered via changing the Br of the beamline (~4 MeV/u up). Optimized pre-drilling transmission ~20% (with thick target) |
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. |
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 |
77
|
Sat May 8 17:29:54 2021 |
Yuri, Sergey, Wolfram, Michael, Shahab | Runs | recording Kr decay measurement on NTCAP |
Uc = 250mA
decay Kr 78, 476 MeV/u
in iso mode
NTCAP is running |
105
|
Sun May 9 13:53:07 2021 |
Yuri, Wolfram, Andrew, Liliana | Calibration | Change of energy: Back as before |
After looking at the spectrum it was concluded that the same isotopes, and no more, could be identified.
Now we change the energy back to 441.7 MeV/u and will open the scrappers to see if Mn comes in.
The picture shows the effect of going back to the previous energy and then the effect of opening the scrappers |
167
|
Thu Jul 1 14:47:15 2021 |
Yury, Helmut | Accelerator | added high Brho scrapers |
So far only scrapers for low Brho were used:
GE01DS_HI = -58mm (arc from inside) and
GEEXDS2HA = -11.2 (straight from outside)
We also want a cut on high Brho to avoid possible strange lines.
GE01DS_HA is limited in motion, at the maximum inside position (0.0 mm) there is no effect.
Next EEXDS1HG (aperture for ToF-detctor) in mm
120 - completely out
60 - no effect full beam
45 - "
30 - "
20 - "
10 - very little beam remaining
5 - gone
12 - little beam
14 - narow but little
16 - narrow with small tail in left side
20 - again like full
100 - full (as reference for the eye)
Then similar with E02DSHG in arc dipole in mm
-130 - full
-60 - full
-40 - gone
-45 - very tiny
-55 - full
-50 - less beam
-52 - similar
-53 - no difference
-58 - looks like full
Now add EEXDS1HG again with -16mm, no difference, so keep both in.
==> we cut in arc from both sides and on straight secton from both sides
Intensity does not look different to scrapers out.
It looks like a bit less 70Se in ESR then 1h before, but maybe other reason. |