 Fri May 17 22:43:11 2024, Jelena B, Zsolt P., Accelerator, ESR_e.cooler are back 
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We have back ESR and we have a fixed issue with a cooler.
Beam issues! |
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Fri May 17 22:48:14 2024, Jelena B, Accelerator, Back to old setting
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We go back to the Zr-settings to make a deffinite state of ESR and we move again to previous setting (Sr) |
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Sat May 18 01:57:44 2024, Weick, Accelerator, 96Sr isoc setting
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We fist verified the ESR after a crash with the 98Zr setting, was fine good resolution,
then we scaled to 96Sr directly at gamma_t not with shift as before.
E_SIS = 449.21 MeV/u for 100Mo 38+
after target = 373.36 MeV/u for 96Sr 38+
in ESR = 373.60 MeV/u for 96Sr 38+
in the LISE calculation this leads to gamma = 1.40082 as before in the other settings.
yield is very low now, but some lines. |
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Sat May 18 02:22:30 2024, Helmut Weick, Accelerator, paper log book pages 17.05.2024
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until we lost the beam in the night. |
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Sat May 18 14:43:59 2024, Yuri, Accelerator, Reduce intensity, 98Mo42+
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reduce intensity
eexds2ha 7mm --> 9 mm
e02ds3hg -69 mm -- stays
measure for about 30 min
9 mm was too much, change to +8 mm |
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Sat May 18 16:45:15 2024, Helmut, Yury, Accelerator, setting for 96Sr (98Y)
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To have a few more lines the setting actually is not on 96Sr directly, but on 98Y39+.
98Y is also the one set to be isochronous.
But in addition the SIS-energy is shifted by -0.9 MeV/u to get at least better transmission for 96Sr. |
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Sun May 19 11:02:49 2024, Xu Zhou, Yuhu Zhang, Kanika, Accelerator, the beam is paused
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The beam is paused and HHT team needs to enter the ring. |
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Sun May 19 12:04:55 2024, Kanika, Accelerator, Beam back
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The beam is back. |
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Sun May 19 14:11:29 2024, Yuri, Sergey, Accelerator, Sextupoles
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at 13:00
scrapers in the ESR are moved to block the most outside orbits
E02DS3HG out -> -60 mm
EEXDS2HA out -> -75 mm
at 13:50
E02KS3 changed from +0.01 to -0.1
E01KS4 is unchanged at -0.26
peaks look somewhat narrower (see telegram) |
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Mon May 20 05:32:17 2024, Gregor, Cagla, Accelerator, Short beam interruption
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We lost the beam for ~2min at (from ~5:28 till ~5:30). Everything seems to be back at the same state. |
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Mon May 20 09:01:14 2024, Yuri, Accelerator, Modify SP magnets
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In attempt to remove double-peak structure, we will modify the SP magnets
START: 9:02
SP unchanged. Other values lead to a worse peak shapes.
Scrapers:
EEXDS2HA: -75 mm -> -5 mm (hopefully the left half is scraped)
E02DS3HG: -60 mm - unchanged
STOP: 9:40 |
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Tue May 21 08:50:06 2024, Yuri, Accelerator, EoB
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End of beamtime!
Request is out.
Scrapers are removed, slits in the TE line removed, ESR is ramped down. |
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Fri May 17 22:38:30 2024, Jelena B, Zsolt P., , ESR + e.cooler are back
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We have back ESR and fixed issue with a cooler. |