we can measure again.

(please write a detailed description if needed)

Energy signals of 90 and 145 degree detector have been checked and exchanged
They were connected to the wrong ADC channel.

Now 
E_Xray2 and t_Xray2 should belong to 90 degree
E_Xray3 and t_Xray3 belong to 145 degree

from now on, everal beam setting will be different. We could not get the beam back to were it was before. When the scraper was pulled back by 2 cm, the loe/energy beam was visible again via cap. 
Schottky. However, no x-rays could be observerved during the target-on phase. 

Hence the interpretation:

beam position has change at least a few mm, at most 2 cm. 

Will now try to get a new overlap with target and need to adjust the detector position too.

All online - Si spectra are cleared.

Here you can find the digital version of the E127 beam time manual.

"The e- cooler settings were the same for the 124Xe and 118Te beams" - Sergey --> speed of the ions is the same --> same MeV/u

E_beam = 10.0606MeV/u

The uncertainty on the cooloer values should be asked from Markus/Regina

beam and target alignement was checked by looking at the Xray rates. Best case when:
Target bump (position) SC 9: -18.5mm

(We were aiming to keep the particles in the beam at a const. level when target switched ON)
pos   bdt
-21   800
-20   1000
-19   1300
-18   1300
-17   1000
-16   500

The bakeout for our detector setup has started on the evening of 27.08.2019 
We have a temperature sensor in the vacuum next to the detector.
The goal is to maximize bakeout temperature, while not going above 125°C at the detector/sensor.

Here is a daily protocol of temperatures and vacuum pressure
T_12 is the set value of the 1st and 2nd controller device
T_34 is the set value of the 3rd and 4th controller device 
T_56 is the set value of the 5th and 6th controller device
T_sens is the temperature measured by the sensor close to the detector

day   date        P_setup    T_sens  T_12   T_34   T_56   comment
1     tue 28.08.  1e-6 mbar  ~100°   ~120°  ~120°  ~120°  carefull start
2     wed 29.08.  3e-7 mbar  ~121°   ~180°  ~150°  ~150°  T_sens reached ~126° during NEG-pump conditioning
3     thu 30.08.  6e-7 mbar  ~124°   ~185   ~150°  ~175°  readjusted T_56, outgassing a bit increased
7     mon 02.09.  5e-9 mbar   ~80°                        during cooldown
9     wed 04.09.  2e-10mbar   ~30°                        after cooldown, NexTorr Pump active     

DSSSD was moved out (HV switched off)
also the scraper was mistakenly moved.

Now we move everything back to its original position

We leave the scraper still in the "scraping position" in order to collect more data.
Soon we should switch to "without sctraper mode"

We filled the Xray detectors.
Yuri is sill tuning FRS for primary beam.

Attached is a plot of the uncalibrated energy spectra taken with the 90 degree xray detector for 118Te (red) and 124Xe (blue).
Shown is the region covering the K-alpha and K-REC peaks.

Calculating the ratios (Te/Xe) for K_alpha and K-REC energies from theory one gets:

K_alpha (theory): 0.9236  
K-REC   (theory): 0.9308

Without energy calibration we get the following ratio (using channel numbers):

K_alpha (exp): 0.9293  
K-REC   (exp): 0.9344

Taking into account that the channel numbers are not calibrated, the agreement is still very good.

In summary we can be sure that we have 118Te stored at 7AMeV.

We found that Xray2 and Xray3 the cabling is not consistent:

90 degree detector 
> E_Xray2 for energy
> t_Xray3 for times

145 degree detector
> E_Xray3 for energy
> t_Xray2 for timing

35 degree detector
> E_Xray1
> t_Xray1

We can run like this, but should be aware of it!

When the readout/control of the det. weight control via serial connection is active, there is a clear signal induced in the Xray detectors for each command sent.

The solution for now is, that we activate weight control NOT DURING MEASUREMENT!

From the CFD of Xray1 (90deg) we get multiple trigger signals every ~5sec for unknown reasons. 
No hint from the preamp signals.

The solution now is to have an extended blocking gate active in the trlo-config of node 2.
There is now a trigger_stretch of 2500ns for all Xray triggers:

trig_stretch(1)  = 2500ns;
trig_stretch(2)  = 2500ns;
trig_stretch(3)  = 2500ns;

This prevents the multiple triggers to reach the lmu (before_dt scalers)
However, this will also lead to a very small loss of good signal triggers that overlay within 2.5 us.

This has to be taken into account for deadtime determination.