START
Assembly and commissioning of BRIKEN neutron detector 

The hybrid configuration of the BRIKEN neutron detector will be assembled at BF2 for the first time with 140 3He
tubes and 2 CLOVER detectors, connected to the Gasific digital data acquisition system and tested with 252Cf
sources.

A elog for the setup of the BRIKEN detector is now operational at https://elog.ph.ed.ac.uk/BRIKEN/

We have setup a list of emails that will receive automatic updates for each new entry to the logbook: C. Domingo, G. Lorusso, T. Davinson, A. Estrade, K. Rykaczewski, J.L. Tain, C. Griffin, S. Nishimura, I. Dillman, F. Montes, J. Agramunt, G. Cortes, F. Calvino, M. Marta

A elog for the setup of the BRIKEN detector is now operational at https://elog.ph.ed.ac.uk/BRIKEN/

Scanning of the BRIKEN detector with the 252Cf source 
along the longitudinal axis (Z axis)

Measurements from Z: -42.5cm to 42.5cm with steps of 2.5cm. 

Altogether 16  tubes are mounted for the parasitic detector test (see the attached photos):

- two tubes (belonging to RIKEN) are in a 10 cm x 10 cm x 30 cm polyethylene matrix inside Eurica, the distance from AIDA is about 30 cm

- 12 tubes (belonging to RIKEN) are in a 20 xm x 30 xm x 30 cm matrix, outside (below) Eurica, at the closest possible place to AIDA, the distance is about 60 cm

- further two tubes (ORNL) are at the bottom of the Eurica support, about 1.2 m from the AIDA Silicon.

Furthermore, spectra measured using a 252Cf source is attached to this report, too (Jap1Cf-RIKEN tube, Us1Cf-ORNL tube). At the moment a background measurement is running.

These are the files used to create and visualize the hit patterns of the BRIKEN detector.

There are three files needed plus one input data file. The three files are "HybridBRIKENPhysicalHistogram.hpp", "HybridBRIKENPhysicalHistogram.cpp", and "HybryidBRIKEN_Tube_Info_1.txt". These files are attached to this eLog entry.

In order to run this type in a terminal

root -l HybidBRIKENPhysicalHistogram.cpp+

The plus is important, it tells ROOT to compile this with the gcc compiler and then run that compiled version of the code. It runs slow, if at all, in the ROOT C++ interpreter CINT.

The code has been tested with ROOT v5.32 and v5.34, not version 6.

At the bottom of the HybidBRIKENPhysicalHistogram.cpp file is the "main program". In it you can set the input data file, which should be a BRIKEN online root output file, and the 3He energy cuts. It is easiest if all the files are in the same folder. If there are any questions please feel free to email B. Charles (Charlie) Rasco.

Manuals for BRIKEN DACQ: 
GasificShort.pdf including "Run protocol"
and Gasific70Manual.pdf (long)

New configuration file of BRIKEN
Changes of 26th-May-2017
Previous config file 24th-May-2017

After the 152Eu calibration, the threshold of 
>> V2A7C4 was increased from 20 to 30. 
>> V2A7C6 was increased from 30 to 40. 

AIDA veto plastic (40cm after the stack of DSSD) and 
the silicon detector (shielding hole) were calibrated 
with the Compton edge of 137Cs (891keV).

We put the 252Cf source and check the aligment of 3He tubes gains:

File: 181025_1600_252Cf_gaincheck.root
All OK except 133, 35 and 140

He133: peak at 744keV
He135: peak at 783keV
He140: peak at 739keV

No gain correction  applied at the moment but should be verified
before experiment

Measurement over night with a 152Eu source inside

Start: 22:48 (03/11/2016)
Stop: 08:26

File: 161104_0826_152Eu.root

Neutron background rate: 0.82 n/s

Installation of BRIKEN PE shielding for beam
related neutrons

The missing metallic pieces needed to mount
the forward PE shielding finally arrive and
we mount it with help of the crane.

The shielding (4 PE slabs + 1Cd-PE slab) has attached 
the support for VETO detectors on the beam side
and for and additional ancillary detector
a large Si detector on the BRIKEN side.
See attached photos.

The distance between shielding and BRIKEN is 40 cm.

Today, Gabor and I discussed with Nathan from ORNL about the biasing system used for Ge, 3He, Plastic, and others.  Phong is also a bit familiar with the system (edit also 
Shintaro 
Go).  While there 
is supposed to be a manual, Gabor and I did not find it.
In case of trouble: contact Nathan Brewer Gmail: Brewer.nathant@gmail.com Skype: nathan.t.brewer

Log in to high voltage PC:

$ ssh -Y pixie16@10.32.6.161
passwd: ************

For HV readout, run firefox in the background

$ firefox &

You can probably check the history or restore pages, but it should be pointed
at 192.168.13.239

It updates automatically every several seconds.  Unless the HV monitor is
running, it may show nothing...

For temperatures:

$ cd ~/DAQ_1/kelvin
$ ./kelvin-read

(there are options to kill all temperatures)

For applying existing HVs (BE CAREFUL!)

$ cd ~/DAQ_1/hv-mpod
$ ./hvmon

If you want to change the voltages (up or down) kill this with Ctrl+C

To alter bias values or change which ones are on, you can edit the file:

$ ~/DAQ_1/include/hvmon.conf

Once the file is saved, restart hvmon.

We are running the above in a GNU screen session, with firefox on one computer.  It has a note taped to it.  Please don't use this computer for other purposes unless necessary!  
Let me note that the PC we log in through has essentially no .screenrc file so you can barely understand you are actually using screen.  If you are not very familiar with 
screen, better not to touch it.  I will put a better .screenrc later (but I also don't want to change the setup now).

28 Mar 2017 15:47:31

Ge voltage application

LN2 filling was done yesterday before lunch

D is the beam left side Ge
	MPOD	name
	U300	D4K
	U301	D4R
	U302	D4G
	U303	D4B

83.7 K, with 300 V

G is the beam right side Ge
	MPOD 	name
	U304	G7K
	U305	G7R
	U306	G7G
	U307	G7B

79.6 K with 250 V (except G7R at 300 V)

All analog signals are seen in the oscilloscope with reasonable behavior

28 Mar 2017 15:56:03 

Ramp up all Ge clovers.

D at 3000 V for all

G at 2500 V for all (except G7R is 3000)

28 Mar 2017 16:26:39 

Biases are all applied (maybe several minutes earlier)

D4 temp 83.7 K
G7 temp 79.6 K

28 Mar 2017 17:51:09 

Now we ramp up 3He and plastics.  We keep the Ge on during this time.

D4 83.7 K
G7 79.6 K

Everything looks good!

Some info on ancillary detector signals

Plastic veto detectors (Top and Botomm):
The dynode signal of the PMT is passed through an
ORTEC 474 TFA amplifier before going to the DACQ
TFA: Gain=6 x min(~x2), Tint=200ns,Tdif=100ns, NonInvert
DACQ channels: Top: V1A7C1, Bottom: V1A7C2
Photo of the signals of both detectors attached 
with 60Co source (with gain changed to 20 x max(~x12.5))
200ns wide 70mV high signal

With this info a rough calibration was established:
for the 2V range an ADC unit is 2000mV/16384=0.122mV
the 70mV (~1MeV) correspond to 574 ADC units which
with the change of gain 6*2/20/12.5=0.048
become 27.6 ADC units. We checked with Gasific
that roughly 1 ADC unit corresponds to 2 EFIR units
thus the calibration is 1/2/27.6=0.018 MeV/unit
NOTE: the calibration in online spectra taken
before noon Sunday 6 was wrong by a factor 2
too large!!!!


Si detector (Top and Bottom halves):
Signal from preamplifier in the low gain mode for the measurement:
we see nothing on the scope with 60Co source. In the high gain mode
we saw the other day a negative 6microsec wide 1mV high
signal with a 60Co.

AIDA plastic veto:
The signal from the PMT is going through a CAEN 
shaping amplifier. The signal has a bipolar shape
with a rise time of 500ns a total width of 2microsec
and a height of 100mV (60Co)

F11 ToF plastic (Left and Right):
The signals are processed  in the same way that the
plastic veto detector with TFA using the same settings.
Polarity of the signal unknown.
Currently we see no signal seems its not connected.
We found later that the NIM crate where the 
TFA  were sitting was not on!
We just made a  calibration with beam particles
LISE was used to estimate an energy loss of 65 MeV for the ions.

Here are the ORNL/UTK BRIKEN analysis slides presented by BC Rasco on 2017/10/20.

Enjoy the fine reading.

The online seems to be missing some slides, but the pdf has all of the slides.

Failure of a quadrupole triplet at BigRIPS (some time after earthquake)

We take the chance of measuring background:

File: 150504_1500_2047_bckg.root
Rate per tube (n/s): U=0.098, D=0.0062, US=0.0200
Ratio to 1st 110Zr: U=1.38,  D=1.99,  US=0.90
Notes:
-Compared to the 1st background measurement there are changes
larger than expected statistical fluctuations: 
perhaps due to slight changes in noise

Beam still down. New background measurement
with new RIKEN tube below the MUSIC chamber 
(call it B)

File: 150505_0040_1130_aprox_bckg.root
Average rate per tube (n/s): U=0.0073, D=0.0065, B=0.0070

Background with BigRIPS+ZD already working
No pulser

After adjustment of thresholds the rate of BRIKEN noise
was reduced to 4.5kHz
The corresponding configuration file is:
181030_Conf_BrikenFull_LowThrAdj_masterCLK.xlsx
To be decided if we want to reduce further the noise rate

We also changed the calibration of the F11 plastic to have it in the histogram range
F11_PL_R_LG: 2.73 -> 1.0 
F11_PL_L_LG: 2.32 -> 2.0


Further adjustment of few channels: Now noise rate is 2.7kHz
(2018/10/30 15:45)

Background measurement AIDA+BRIKEN
AIDA is inside BRIKEN

AIDA was taking data.
Start: run  31 subrun 41
Stop:  run 41 subrun 239


BRIKEN started later.

Start: 27th-May, 19:19
Stop: 28th-May, around 11:00

DLT File name:170527_1919_bck_AIDAinside_022.dlt
RUN numbers: 022-024
RootFile: 170527_1919_1914_bck_AIDAin.root


Comments: at 28th-May, 19:17, reset time stamp

AIDA trigger plugged in Mod2 Ch12

AIDA plastic (veto) and Si de calibration

For the calibration the Compton edge of the spectrum seen in the detectors was used.
There is a large uncertainty in that determination, since the spectra are not so clear in terms of shape.

For the spectra V1A7C13_EFIR (Si de, top) the channel position is 12900 units

For the spectra V1A7C14_EFIR (Si de, bottom) the channel position is 12950 units

For the spectra V1A7C9_EFIR (AIDA plastic) the channel position is 10425 units

These corresponds to the following calibration factors using 0.9 MeV as the Compton energy from Co source:

V1A7C13_EFIR (Si de, top): 6.976744E-5
V1A7C14_EFIR (Si de, bottom): 6.949807E-5
V1A7C9_EFIR (AIDA plastic): 8.633094E-5