| ID |
Date |
Author |
Category |
Subject |
Text |
 |
|
Draft
|
Fri May 14 09:35:20 2021 |
Nightshift | Runs | Coasting beam, scanning laser, ecooler on | |
|
|
53
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Fri May 14 09:38:04 2021 |
Nightshift | Runs | Coasting beam, scanning laser, ecooler on | |
|
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54
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Fri May 14 09:38:43 2021 |
Nightshift | Runs | Coasting beam, ecooler on, scanning laser | |
|
|
55
|
Fri May 14 09:40:04 2021 |
Nightshift | Runs | Ecooling vs laser wavelength shift, coasting beam, laser stronger than Ecooling | Last three pictures where taken after
first laser ion beam overlap adjustments
|
|
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65
|
Sat May 15 09:50:31 2021 |
Team | Runs | Laser cooling of.... | H=2
H=7
H=10
|
|
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66
|
Sat May 15 09:57:24 2021 |
Dayshift | Runs | Currently on schedule | Enhance fluorescence rate and perform
laser bunch timing
|
|
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1
|
Mon May 10 07:58:13 2021 |
Danyal | General | Telephone numbers and Zoom link | Telephone numbers:
ESR laser lab: +49 (0)6159 71 - 2882
|
|
|
2
|
Tue May 11 15:49:30 2021 |
Danyal | General | setting up ESR | The operators are still busy extracting the
beam from the SIS18 towards the ESR and injecting
it into the ESR. |
|
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5
|
Tue May 11 18:29:35 2021 |
Danyal | General | first ions in the ESR | |
|
|
6
|
Tue May 11 20:14:43 2021 |
Danyal | General | bad ESR vacuum | I just heard that the ESR vacuum is quite
bad.
There was a small vacuum problem a while |
|
|
8
|
Wed May 12 02:34:29 2021 |
Danyal | General | instabilities in ion frequency | The ion beam moves around, pretty arbitrary.
See picture.
ESR crew believes that it is not due to fluctuations |
|
|
10
|
Wed May 12 08:10:17 2021 |
Lars | General | instabilities in ion frequency | looks like the E-Cooler is responsible for
this. If one turns off the electron current,
the beam stays stable.
|
|
|
17
|
Wed May 12 09:59:08 2021 |
Benedikt | General | Rigol DSG821 signal generator settings | |
|
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22
|
Wed May 12 18:59:15 2021 |
Ken Ueberholz | General | Power is back | Power is back and most things are running
again |
|
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23
|
Wed May 12 19:48:24 2021 |
Sebastian | General | DSG821 Network | To implement the bunch Signal Generator (DSG821
inside ESR) you have to:
|
|
|
24
|
Wed May 12 22:28:55 2021 |
Ken Ueberholz | General | Bunching succesfull | Bunching with 2 and 10 bunches succesfull |
|
|
25
|
Wed May 12 22:35:33 2021 |
Danyal | General | frev and fb | Schottky frequency (189th harmonic) = 244.033662
MHz
|
|
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26
|
Wed May 12 22:48:25 2021 |
Sebastian | General | DSG Control SCPI Commands | Open Ultra Sigma
Press LAN
Press Search, after a while the whole rigol |
|
|
27
|
Wed May 12 22:57:41 2021 |
Sebastian | General | Laser Reprate | laser reprate is seven times the revoolution
frequency: 9.038283 MHz
pulse length: 735ps |
|
|
29
|
Wed May 12 23:45:23 2021 |
Ken Ueberholz | General | Laser does not reach the exit window | High rates on the detector at 50mm positions,
laser does not seem to reach the exit window. |
|
|
33
|
Thu May 13 01:13:06 2021 |
Sebastian | General | Bunching frequencies | relating to Danyals ID 25 post are the current
bunching frequencies:
|
|
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34
|
Thu May 13 01:21:30 2021 |
Sebastian | General | Current schedule ... so far | 1.) check h=2,4,6,7,8,10 .... bunching frequencies
with different amplitudes (signalgenerator),
Ecooler ON, Laser OFF --> record schottky |
|
|
35
|
Thu May 13 01:55:15 2021 |
Sebastian | General | ESR amplifier reset / laser check | we had to go into the ESR because the amplifiers
hooked up. both amplifiers were resetted!
|
|
|
36
|
Thu May 13 02:42:58 2021 |
Sebastian | General | Lasershutter ESR Entrance?! | attached should be the name of the entrance
laser shutter. just in case somebody will
close it ;) |
|
|
38
|
Thu May 13 03:35:25 2021 |
Lars | General | Status: Current schedule ... so far | 1.) so far:
h = 2, 4, 6, 7, 8, 10, 12, 14, 16, 18, 20,
30
|
|
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39
|
Thu May 13 18:34:54 2021 |
Ken Ueberholz | General | What happened scince shift change at 4pm | Ion frequency shifts with laser, both manually
and scanned, without bunches: successful
Bunching with 7 and 20 bunches: successful
|
|
|
40
|
Thu May 13 20:18:10 2021 |
Benedikt | General | New f_rev | The ions were changed to a different speed
today at 2 PM. The new revolution frequency
is now 1.291278 MHz. |
|
|
41
|
Thu May 13 21:00:48 2021 |
Benedikt | General | New reprate of the UV laser | The lasersystem now operates at a reparte
of 9.038946 MHz. This is 7 times f_rev (see
previous post).
|
|
|
42
|
Thu May 13 23:42:37 2021 |
Ken Ueberholz | General | What was done | In this shift a number of successful Schottky
measurements were done:
With fixed laser wavelength, while varying |
|
|
43
|
Fri May 14 01:28:04 2021 |
Sebastian | General | "new" laser wavelength | Minor changes in electron cooler voltage (~+13V,
now 66903V measured by DMM) leads to that
we had to shift the laser wavelength to:
|
|
|
44
|
Fri May 14 01:34:44 2021 |
Team | General | strange XUV Anode signal | We see a strange behavior of the anode signal
when we bunch the ion beam and electron cooler
is on.
|
|
|
45
|
Fri May 14 04:50:46 2021 |
Team #Night | General | Scraper Tests Ion / Laser Beam | laser is 4-6mm below the ion beam.
It could be that the interaction between
both beams came only from the interaction |
|
|
47
|
Fri May 14 06:35:55 2021 |
Team #Night | General | Adjustment of Laser | we increased the height of the laser beam
TEM Settings
|
|
|
48
|
Fri May 14 07:20:18 2021 |
Team #Night | General | actual bunching frequency | 25,82556 MHz
h = 20 |
|
|
Draft
|
Fri May 14 07:33:42 2021 |
Team #Night | General | ecooler central frequency shifted relative to bunch central frequency | |
|
|
50
|
Fri May 14 08:55:53 2021 |
Sebastian | General | ToDO 14.5 ...so far | 1.) ion lasser overlap and scraper test
2.) change bunching frequency to middle of |
|
|
51
|
Fri May 14 09:00:55 2021 |
Sebastian | General | UNILAC Problems | ~30 min downtime
--> LASER ADJUSTEMENTS! |
|
|
57
|
Fri May 14 16:37:01 2021 |
Benedikt | General | Status update | Right now, we have to adjust the ion beam
a bit to overlap better with the laser beam.
We keep the laser wavelength at resonance |
|
|
58
|
Fri May 14 21:43:40 2021 |
Sebastian | General | "problems accelerator" | There are cooling problems of some accelerator
devices
short break, hopefully :)
|
|
|
61
|
Sat May 15 03:39:16 2021 |
Team | General | actual revolution frequency | frev = 1,2912735 MHz |
|
|
62
|
Sat May 15 06:51:16 2021 |
Night Shift Sebastian/Max/Noah | General | Different Laserscantypes | We use different scan types (manual scan)
or constant laser wavelengths to check the
effects of laser cooling in the Schottky |
|
|
67
|
Sat May 15 11:06:31 2021 |
Benedikt | General | New Zoom link for the moment | https://tu-darmstadt.zoom.us/j/4948400422?pwd=SEJaUzBuYXM0TTd6UWxoZTFlWEZxUT09
Meeting ID: 494 840 0422
|
|
|
68
|
Sat May 15 11:26:44 2021 |
Benedikt | General | TEM parameters | We changed the horizontal position of the
laser beam a bit, so that we maximized the
fluorescence signal on the XUV detector (coasting |
|
|
69
|
Sat May 15 12:11:54 2021 |
Benedikt | General | Laser-bunch-timing | Optimizing the laser bunch timing.
h = 7 (9.0389145 MHz)
Reprate is already set to same frequency.
|
|
|
70
|
Sun May 16 02:18:53 2021 |
Sebastian | General | UV Drop | 1:25 a.m. huge drop in UV laser power
-> small crystal bump with both y screws
of bbo oven |
|
|
Draft
|
Sun May 16 02:20:58 2021 |
Sebastian | General | "Der Laser ist (wieder) ok" | |
|
|
72
|
Sun May 16 02:22:19 2021 |
Sebastian | General | "Der Laser ist ok" | |
|
|
73
|
Sun May 16 02:28:21 2021 |
Team | General | #Beam ON! | Laser specs:
pulse length -> 482ps
|
|
|
74
|
Sun May 16 05:09:04 2021 |
Team | General | Laser cooling with 482ps | we see laser cooling with 482ps pulse length |
|
|
75
|
Sun May 16 05:09:27 2021 |
Team | General | Switch to 285ps | pulse length -> 285ps
minimum 62mW inside ESR (depending on laser |
|
|
76
|
Sun May 16 05:24:00 2021 |
Team | General | Laser cooling with 285ps | we also see laser cooling with 285ps pulse
length |
|
|
77
|
Sun May 16 06:13:46 2021 |
Team | General | Switch to 166ps | |
|
|
78
|
Sun May 16 07:03:07 2021 |
Team | General | Laser cooling with 166ps | We saw some indications of laser cooling @
166ps pulse length |
|
|
79
|
Sun May 16 07:18:56 2021 |
Night Shift Sebastian/Max/Noah | General | Preparation for automated laser scans | We shut the laser system down to prepare automated
laser scans |
|
|
80
|
Sun May 16 11:29:22 2021 |
Benedikt | General | Automated laser scans working | The automated laser scans are working now.
We can now scan with the following functions:
triangle, sawtooth, cosinus/sinus, arctan, |
|
|
81
|
Sun May 16 21:23:02 2021 |
Team | General | ESR OPEN -> preparation for Polarisation Tests | |
|
|
82
|
Sun May 16 22:11:49 2021 |
Team | General | Laser Polarisation values | maximal transmission of PBSC (257/514 pbsc
was used in combination with xlp12 detector
and visual on a screen):
|
|
|
83
|
Mon May 17 08:05:42 2021 |
Team | General | End of beamtime | ~ 8 a.m. |
|
|
84
|
Mon May 17 21:43:56 2021 |
Danyal | General | The test beamtime was a success. | Dear all,
The test beamtime is now over.
|
|
|
4
|
Tue May 11 16:33:31 2021 |
Ken Ueberholz | Detectors | Detector control manual | Attached to this elog entry is a short manual
for the xuv-detector control. If anything
is missing or not understandable I can change |
|
|
85
|
Tue May 31 07:29:11 2022 |
Ken | Detectors | XUV-Detektor | Rate was very low: ~ 100Hz
Adjusted Walk level and Threshold, new rate:
5kHz
|
|
|
3
|
Tue May 11 16:07:59 2021 |
Sebastian | DAQ | DAQ Manual | Attached you'll find a short manual for operating
the whole DAQ system |
|
|
14
|
Wed May 12 09:04:48 2021 |
Sebastian | DAQ | Keysight AUtoCal | |
|
|
Draft
|
Wed May 12 09:05:48 2021 |
Keysight Settings | DAQ | | |
|
|
16
|
Wed May 12 09:09:15 2021 |
Sebastian | DAQ | Fluorescence | fluorescence with detector in parking position
fixed laser wavelength
electron cooling ON,
|
|
|
19
|
Wed May 12 10:15:47 2021 |
Volker Hannen | DAQ | Unplugged TDC inputs for MCP front and back | To reduce the load on the VUPROM TDC, we unplugged
the TDC inputs for the front and back signals
of the MCP of the XUV detector.
|
|
|
28
|
Wed May 12 23:36:18 2021 |
Ken Ueberholz | DAQ | VI change | carbon main vi - kopie is now in operation
here, in keysight.vi the input settings for |
|
|
30
|
Thu May 13 00:58:53 2021 |
Danyal | DAQ | unbunched ion beam | |
|
|
31
|
Thu May 13 01:01:27 2021 |
Danyal | DAQ | bunched ion beam | |
|
|
32
|
Thu May 13 01:05:45 2021 |
Danyal | DAQ | more stability by bunching | Because the C3+ part of the ion beam is properly
bunched, it is no longer so sensitive to
the drifts caused by the e-cooler.
|
|
|
56
|
Fri May 14 11:01:33 2021 |
Benedikt | Calibration | Laser Beam adjusted | The laser beam was adjusted in his position
to overlap better with the ions.
|
|
|
11
|
Wed May 12 08:32:04 2021 |
Sebastian | Analysis | fluorescence & energetic overlap | During the night shift we saw several rises
of the fluorescence (see another entry) and
also energetic overlap in coasting beam modus.
|
|
|
12
|
Wed May 12 08:41:36 2021 |
Sebastian | Analysis | Laser stability | During night shift the laser was very stable!
Only minor fluctuations occured in the UV |
|
|
13
|
Wed May 12 08:42:49 2021 |
Sebastian | Analysis | Laser scans / coastig beam / no ecooler | Attached you'll see a first laser scan of
~100GHz in the UV. |
|
|
37
|
Thu May 13 02:45:29 2021 |
Sebastian | Analysis | ESR pressure | |
8x |
|
46
|
Fri May 14 06:34:45 2021 |
Team #Night | Analysis | DSG821 IP | 140.181.104.108 |
|
|
Draft
|
Wed May 12 02:16:25 2021 |
Danyal, Lars | Accelerator | Ion beam position | Laser Position with scrapers verified.
1HA: impossible to scratch laser beam, still
there at -1.0 mm |
|
|
18
|
Wed May 12 10:14:18 2021 |
Lars | Accelerator | E-Cooler | M.Steck et al. discussed about the E-Cooler
and found a possible issue. They asked for
enterance to the ESR. Since nobody else was |
|
|
20
|
Wed May 12 13:11:58 2021 |
Danyal | Accelerator | short break between 13:30 and 15:30 | There will be a short break (2 hours) this
afternoon. Between 13:30 and 15:30.
The so-calles "super lense" in the UNILAC |
|
|
21
|
Wed May 12 15:36:04 2021 |
Danyal | Accelerator | general power failure in ESR! (everything is off) | The power in the ESR is off.
(also on the gas-target area on top of ESR)
Electrical engineers are trying to find and |
|
|
59
|
Fri May 14 22:04:25 2021 |
Team | Accelerator | ESR OPEN ; NO BEAM -> Reset cooling device | we had to open the ESR to reset a cooling
device |
|
|
60
|
Fri May 14 22:20:37 2021 |
Team | Accelerator | ESR Closed - BEAM #ON! | |
|
|
63
|
Sat May 15 09:22:41 2021 |
Sebastian | Accelerator | Ekühler | Settings für Ekühler an und aus in SC4 und
5 |
|
|
64
|
Sat May 15 09:23:52 2021 |
Sebastian | Accelerator | Ekühler | Tab "Kühler Elektronenstrahl"
An Gerät schicken |
|