In this shift a number of successful Schottky measurements were done:
With fixed laser wavelength, while varying the wavelength, with different bunching and more (see logfile 1 for more info: line 53 to at least 107).
The detector software sometimes files to change the current of the power supplies, if this happens a simple restart of the GUI fixes the problem.
Once in this shift the Mesytek in the laser lab turned itself (?) off and the background rate increased. Hopefully this was a single event.

Minor changes in electron cooler voltage (~+13V, now 66903V measured by DMM) leads to that we had to shift the laser wavelength to:

1028,965nm 

to see an increase of the countrate of the XUV ANODE Signal.

electron cooler ON
electron cooler current (SET 120mA, HKR "measured" 102mA)
bunched beam, h=20

We see a strange behavior of the anode signal when we bunch the ion beam and electron cooler is on.

peak structure... ---> we play now with the bunching amplitude 

200mV
150mV
100mV ---> Peaks higher?

see attached file

laser is 4-6mm below the ion beam.
It could be that the interaction between both beams came only from the interaction between the laser halo with the ion beam ?!

140.181.104.108

we increased the height of the laser beam

TEM Settings
OffsM Ay -0,07
OffsM By -0,35

1VO scratches 6
2VO scratches 3-4

25,82556 MHz
h = 20

1.) ion lasser overlap and scraper test

2.) change bunching frequency to middle of ecooled coasting beam

3.) long time measurements see labbook HKR
3.1) try ecooler on/off ; bunch on / off ; laser fixed on / off ; laser scanning on / off ; try different bunching amplitudes (MAX :LEV 0.25V) ; try other h = 10, 7, etc...
3.2) Dont forget to plug in the schottky trigger -> maybe change acquisition and analysis time if needed

4.) XUV detector tests
4.1.) laser - bunch timing by checking xuv anode signal

~30 min downtime

--> LASER ADJUSTEMENTS!

Last three pictures where taken after 
first laser ion beam overlap adjustments

It seems to be that the interactions are 
better. We also see the laser earlier and 
stronger in the schottky 

The laser beam was adjusted in his position to overlap better with the ions.

Ion beam is destroyed at scraper position 1VO 6 mm and 2VO 4 mm; the laser beam looses half its power at 1VO 6mm and 2VO 4 mm.

EDIT: In the Schottky spectrum, we saw a stronger "cut" from the laser beam with slightly different settings in the TEM system. Later today, we could maybe finetune the ion-laser overlap while observing this "cut".

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 with the ions and try to optimize the fluorescence signal on the XUV detector while moving the ion beam.

There are cooling problems of some accelerator devices
short break, hopefully :)
Laser is switched of for some rest

we had to open the ESR to reset a cooling device

frev = 1,2912735 MHz