Clarion2
Introduction
Clarion2 is the successor of Clarion (CLover Array for Radioactive ION beam). It is a 4π gamma ray detectors array with 16 High-Purity Germanium (HPGe) clover detectors. Each HPGe detector is shied with a BGO (Bismuth Germanate [Bi4Ge3O12]) shield.
HPGe Clover Detector
The detector is produced by EURISYS Measure, now CANBERRA, owned by MIRION Technologies [ref]. An approximate 3.3 kg clover detector consists of 4 coaxial crystals (dimension 50 mm in diameter, 80 mm in length) [Mirion webpage].
Typical photon-peak efficiency curve
GEANT4 simulation
The performance of a single clover detector was simulated using GEANT4. The source code can be downloaded from https://github.com/goluckyryan/HPGeClover.
Trinity
Trinity is formed by GAGG (Gadolinium Aluminium Gallium Garnet) detector arrays. It is located in the target chamber of the Clarion2.
DAQ
The DAQ system is fully digitized with Pixie16 digitizer.
LN2 cooling system
The liquid Nitrogen (LN2) filling system developed by Mitch Allmond (Oak Ridge) is hosted on the DAQ computer under account "ln@ln02".
ln@ln02 Directory
Several important directories for using the LN2 system are listed below.
/gln
/gln is the most important directory, it is where the control program is located and for most problems is where you will need to go
gln_ui
gln_ui is the user interface to issue commands to the fill program
fill <det-list>- fill detectors <det-list> now
fill <det-list> after <number-of-minutes>(or <hours:minutes>)- wait to fill detectors <det-list> by time <hours:minutes>
cool <det-list>- cool down detectors
ton <det-list>- turn on (enable fill for) detectors
tof <det-list>- turn off (disable fill for) detectors
con det#[.temp#]- turn on checking of detector temps
cof det#[.temp#]- turn off checking of detector temps
abort- abort and disable all fills
load [fig-file-name]- load configuration from fig-file-name (default = gln.fig)
exit-master- exit gln_master process
 Warning : | This will stop the fill system |
clr- clear all errors for entire system
 Notice : | Proper usage is to clear individual detectors |
clrd <det-list>- clear errors for specific detectors
clrs- clear all slot errors
clrm- clear all manifold errors
d- display status
dt- display times of all detectors & manifolds (formatted dates and times)
dts- display times of all detectors & manifolds (in seconds)
dc- display configuration (valve and ADC IDs, etc)
mon- enter monitor mode; type control-C to exit
quit- exit gln_ui process
hvln- useless command for backward compatibility
clear- clear screen
?orhelp- help text for commands
Low Level Commands
radc <#>- read ADC number <#>
opv <#>clv <#>- open and close valves
| Warning : | Be careful with this |
http://clarion02.physics.fsu.edu/~clarion02/index.html
Contact
- Mitch Allmond mailto:allmondjm@ornl.gov
- Tim Grey mailto:graytj@ornl.gov
- who should be contacted?