The DSSD has been exchanged and aligned in 
November 2020. After bakeout at 140°C 
(externally, 120°C at internal temp. Sensor) 
for more than a week, the vacuum in the setup 
is roughly 4.5e-10 mbar.

After the bakeout the detector had to be 
realigned, it was lower by 1-2 mm. Using the 
line laser the realignment was done by 
touching only the screws on the far part of 
the base of the flange. These screws have been 
thightend by about a 1/4 turn after releasing 
the headless positioning screw accordingly.

We moved the new detector installation for the first time slowly into the dipole chamber.
The alignement seems to be pefect, no distortion or vertical movement of the detector-arm was observed from the window flange.

The vacuum on the detector side went up from 2e-10 mbar to about 5e-9 mbar.
On the ring side it was 3e-11 mbar befor and 1e-10 mbar after movement.

The extreme positions possible (Endlage) are:

max out: -10613 
max in: -7

These are the absolute positions in units of 0.1 mm

It has to be noted that after bakeout a realignment of the detector was needed in order to have it centered in vertical dimension. However, this realignment has been only slight turns of the base flange alignment screws. In detail, the two inner "Sechskantschrauben" below the bellow have been loosed slightly, while the outer two have been tightend. Additionally, the small "Madenschraube" on the outside has been loosend by 1/4 turn.
In result the detector could be raised in vertical position by about ~5mm (jugded by eye).

The effect of small turning on the screws is extreme on the detector position! Be careful when re-adjusting.

• measurement
  d1 = moved back from beam = 15 +/-.5 mm
  d2 = DSSSD frame width = 8.85 mm
  d3 = pg center on DSSSD = 7-7.5 bin = 21.7-23.2 mm = avg = 22.5 mm
  
  --> pg from beam in x = -46.4mm +/- 1.5mm
  --> pg on DSSSD from center ~ -3.28mm +/- 1.5mm
  
  
• simulation
  x = -46.5 mm
  y = 0 mm
  
  
• detector active area position
  x = (-73.35mm) - (-23.85mm)
  y = (-14.2195mm) - 23.5125mm
  
  
• SCRAPING: x=-35mm +/-0.5mm away from beam
  y=(-20mm) - (40mm)
  
  

• measurement
  d1 = moved back from beam = 16 +/-.5 mm
  d2 = DSSSD frame width = 8.85 mm
  d3 = pg center on DSSSD = 7.5 bin = 23.2 mm
  
  --> pg from beam in x = -48.05mm +/- 1.5mm
  --> pg on DSSSD from center ~ -3.28mm +/- 1.5mm
  
  
• simulation
  x = -48 mm
  y = 0 mm
  
  
• detector active area position
  x = (-74.35mm) - (-24.85mm)
  y = (-14.2195mm) - 23.5125mm
  
  
• SCRAPING:
  x=-35mm +/-0.5mm away from beam
  y=(-20mm) - (40mm)
  
  
  

The DSSSD is moved back to its measurement position(-25mm).

To find a good Si position, we need to follow a procedure similar to this:

1. Si in max-in position
2. find distance of beam by scraping with detector from inside 
--> zero position
3. from this zero, we need to set a distance of about 1.5 cm to the inside (as shown in the sketch below)

It is likely that this position is not compatible with the complete ESR cycle (e.g. we scrape beam with det. during deceleration).
The solution is to move the beam closer to the detector after deceleration. There are two feasible methods to do this:

A. make a local bump in the dipole
--> check new zero and det. position again, as sketched above
--> in 2016 this method didn't allow to go close enough to the detector, eventually we used:

B. global orbit change (by magnet ramp) + target bump (to keep overlap)
--> this takes a bit more time to set up and also the cycle will be longer at low energies (critical due to life-time)
--> method A is preferred, but might not be strong enough

This needs to be checked and repeated for each new beam setting.

Run stopped for detector fillings

Jan is filling the detector after run0137.

To move the detector remotely from the HKR:
-go to a desktop of a HKR computer
-right click: "App Launcher PRO"
(-you have to give some password at this point?)
-within the program go to "Development->ProHelper"
-write the name of our slow control unit in the field Nomen: "GE01DD4AS"
-There are 4rows, the middle two called: "Read props", "Write props"

-In "Read props" open "rposiabss" -> if you hit here the refresh button it will show only the SET position
-In "Read props" open "rposiabsi" -> if you hit here the refresh button it will show the REAL-TIME position of the detector

-In "Write props" open "wposiabss" -> here you can set the absolute position of our detector (one click is already enough to execute the command).
 most OUT of the ring  position: -10613 [0.1mm] in absolute
 most IN into the ring  position: -7 [0.1mm] in absolute
 The value can have as big step size as we want contrary to relative movement, when you are limited to something like 20cm.

To close the program just simply hit the "x" buttons.

Here is a representation how was the time management during E127. The time, what we could spend with measuring the 118Te(pg), was ~20% comparing to the given 6days.

close file : run104 (14:12:44)
E127 experiment finishes on a successful note )) Congratulations to the entire team !!

The full cycle length of ESR with 30 stacks is about 7:45 minutes, out of which 15.5 sec are with target switched ON.
This is without CMB/HTD in parallel.

For the x-ray detectors, efficiencies have been measured, before and after the experiment was performed. 
The preliminary results of the determined efficiencies can be seen in the attached plots 

Below are the results from the e-cooler voltage offset measurments done by Regina Hess et al. using the voltage divider (VD).

--7 MeV-- 
Sollwert GECEBG1E: 4008.3 V     
Measured at VD: 3913 V
Offset: -95.3 V

--6 MeV-- 
Sollwert GECEBG1E: 3460.5 V     
Measured at VD: 3364 V 
Offset: -96.5 V

Below are the cooler parameters from ParaModi for our production runs.

--7 MeV/u--
UE: 3842.7V
IE: 50mA
BG1E: 4008.7V
BG1E dU: 120V

--6 MeV/u--
UE: 3290.833V
IE: 50mA
BG1E: 3460.4809V
BG1E dU: 120V

--energy calculation--
as described here 

-- uncertainty --
for E108b we agreed on 10%
maybe further discussion is needed

since about 01:40 AM, there is no beam in ESR. .
stopped data acquisition
OPs are working on it. After searching, OPs decided that something is wrong with ESR.

Pierre Michel and Laszlo go inside the ESR for switching on the MCP detector so that the photons from the gas jet and secondary beam interaction can be seen.

Close file: run061

Target thickness must be like 5mm (was measured with a moving thin wire)
The beam thickness is small because of the low intensity
Maybe we hit the target a bit offset --> less rate?

We might have the option to increase the target 1magnitude more, but this might not help because we can kill the beam 
with this.

I have the impression we just simply have less number of stored ions like 10^4 or evem less...

Yury: "we are unsure about the settings and desperately seek for any means of additional diagnostics"

Maybe, our degrader in FRS was removed by hand at (~13:40 26/05/21)
It is put back now (~13:10 27/05/21)
All runs taken in this period have to be double checked!

However, the xray lines from this night show Te for k_alpha and K-KREC

It is also possible that the readout of this degrader motor was just wrong due to its state as hand-controlled.