We see two species in the Schottky spectra during the beam lifetime measurement without the target. The one (probably the primiary beam) is significantly better cooled than the other.
So, we were wondering what is the other beam? Maybe the recombined ones?

Ragan and Ruijiu went in the ESR for short time to fix something with the slow control of the silicon detector.
After this, there is no beam in the ESR.

The HKR crew informs us that several machines in ESR are showing malfunctions.
The on-call expert cannot be reached.

Update (16:36): On-call service has been informed.

Update (16:48): ESR cycle stopped.

Yuri and Sergey (on phone) have investigated extensively the problem with having no beam in the ESR. The FRS has been checked and seems OK. The ESR is fine as well.
The problem seems to be the timing. Ths SIS and the ESR seem to be completely out of synchronization. The on-call service for the control system has been called. 

As we (RuiJiu and me) changed the jumpers of MSCF 1, 2,3 and 4 yesterday, now we see nice positive signals on picoscope.
Yuri and Sergey are still working on optimising the Tl fragments !

beam: 
energy: 

purpose: data with electron cooler current xx mA

Detector position (CsISiPHOS):  mm
Detector position (MWPC):       mm

run start at xx:xx , first file: run0xxx.lmd
run stop  at xx:xx , last file:  run0xxx.lmd

_______________________________________________________________________________

time: 

I_cooler =  mA



HV1
CH1 voltage:           V  
CH1 leakage current:   uA

CH2 voltage:           V  
CH2 leakage current:   uA

CH3 voltage:           V  
CH3 leakage current:   uA

CH4 voltage:           V  
CH4 leakage current:   uA

HV2
CH1 voltage:           V  
CH1 leakage current:   uA

CH2 voltage:           V  
CH2 leakage current:   uA

CH3 voltage:           V  
CH3 leakage current:   uA

CH4 voltage:           V  
CH4 leakage current:   uA


SIS particles before:           
ESR particles at injection:     
ESR particles after stacking:     
Target ON density:              


NTCAp file:
IQ_2020-03-27_21-02-31/0000xxx.iq.tdms
SC_2020-03-27_21-02-31/0000xxx.iq.tdms

copy and repeat the above (below the line) every 30 minutes

Alex goes to Messhute to check the signals from MPWC. After he completes, we start with the measurements with the primary beam )

There is problem with SIS
Run stop: 0257.lmd (at1:06)

The following shows the pattern for first measurement in ESR (gas jet is on for = 60*5 secs = 300 secs as it can be seen on step SC7 in pattern).
One injection cycle runs for ~ 6 mins.

In the picture below, a very nice storage of 206Pb81+ at 200 mA electron cooler current for no gas jet target can be seen in ESR. The measurement started at 02:24 and we will now finish it in 5-10 mins. We will now do two more measurements for I_cooler = 10 mA ans 20 mA.

In the ESR picture below, the decay of beam is very fast initially for few minutes and then the decay is constant. But why does it decay for first few minutes ?

To start a new run with NTCap, we need to retart NTCAP. 
1. Stop labview program. 
2. Start labview program and start a new run.

Below in the schottky spectrum, on left is 203Tl80+ contamination, in middel is 200Hg79+ contamination and on right most is 205Tl81+.
These contaminations cannot be seen on CsISiPHOS but can only be seen on schottky.
The goal now is to get rid of these contaminations by putting slits.

203Tl80+ impurity is removed by moving scrapper inside ESR.
Only 220Hg79+ is left now

It can be seen in the video how 203Tl80+ (on extreme left) and then 200Hg79+ (in middle originally) is separted from 205Tl81+ by using scrapper in ESR.
Now, we want 205Pb81+ mixed with 205Tl81+ to be separated as much as possible in FRS.

On 1 April by 5 pm, we could stop the stochastic cooling after the stacking process and also change the orbit of the Tl beam to centre. 
Thanks to the efforts by the ESR team !

Yuri sets up FRS with 2 g/cm2 degrader (previous one is 1 g/cm2). The ESR is not changed. The contamination should be less now.

For Alle and Kuehler the bottom left status should look like as shown in pictures below.

04:09 Electron cooler had some problem when we were stacking for 2 hours measurement.
04:20 GECEBG2T and GECEBG5T were Reset and then Switched on. Electron cooler started working again

Please read the attachment.