There is no beam in the ESR due to some problem in the UNILAC.

Beam is back in the ESR.

There is no beam in the ESR again.

12:50 Beam is back again in the ring.
12:52-until now Kicker problem in the ESR.

Dear all,

unfortunately, the E128 experiment must now come to an early end. 
The problem(s) with the injection septum are severe and no work around solution (with acceptable risks) could be found. 
Several things were tried, but without hope. 

Many thanks to everybody involved during the preparation time and the shifts during the beamtime. 

Best wishes,

Wilfried

> Dear all,
> 
> unfortunately, the E128 experiment must now come to an early end. 
> The problem(s) with the injection septum are severe and no work around solution (with acceptable risks) could be found. 
> Several things were tried, but without hope. 
> 
> Many thanks to everybody involved during the preparation time and the shifts during the beamtime. 
> 
> Best wishes,
> 
> Wilfried

There is beam again in the ESR. The plan is to take beam until tomorrow morning. 

We overlapped the laser and ion bunch in the time domain. 
Therefore we delayed the bunching HF in order to see the PMT signal between bin 10 and 22. Before the signal Peak was in channel ~145-5 and difficult to gate on.
Afterwards we also have to shift the laser.
The new values are:

PD NO: 77.5
PD SO: 113
Ion bunch: 16.5 

until 15:15 we have measured with I_e = 100 mA (3 loops per file) 
E_cool HV = 225255 V 


after that (at 15:26) we changed to I_e = 200 mA (2 loops per file) 
E_cool HV = 225272 V 

after that (at 17:15) we changed to I_e = 50 mA (first 4 then 6 loops per file) 
E_cool HV = 225247 V 

At 17:15 we changed again the E-cooler current I_e = 50 mA  
(4 laser scan loops per injection) 
E-cool HV = 225248 V 

We found a "Bug" in the control of the Sirah dye system.

Due that we don't use the FCU and the temperature control unit we could not start the Sirah software without getting numerous errors. 
The fix was to plug in the BBO oven again, move the FCU to "origin", than move to a specific location that the FCU goes in an "idle" mode. 
Than the Sirah software can be started again without getting erros. 

"Laser step complete" and "laser scan complete" are working again.

Problems:
1) Connections were wrong in the Software. 
2) Sometimes the connection to "laser scan complete" was lost (Wackelkontakt).
3) The VI was initialized with the wrong LabJack Channels.

Now:
1) fixed connections in the software.
2) switch to an other "channel" of the LabJack device for "laser scan complete".
3) The channels in the Cobra VI are for...
laser scan complete -> Channel 5
laser step complete -> 6

We definetely should keep an eye and check frequently the signals, that we do not have a lost connection (Wackelkontakt) again of these 2 channels.