SpecTcl is the NSCL's event data analysis tool used for online and offline data analysis during experiments involving the S800 spectrograph. The documentation is accessible at: http://docs.nscl.msu.edu/daq/spectcl/.
The SpecTcl Control has been adapted for special functions required for the analysis of S800 data. SpecTcl can be opened from computer u4pc8 by clicking on the icon SpecTcl located in its desktop, or from a Linux terminal by typing
Spectra definition files can be found in directory /user/s800/s800spectcl/Definitions. Some pre-defined windows with useful spectra can be found in directory /user/s800/s800spectcl/Windows.
The figure below shows the GUI control of the S800 analysis.
The inverse map which enables the trajectory reconstruction of the particles within the spectrograph beam line can be loaded. Snapshots of CRDC and TPPAC events sampled in the pads and strips can be viewed. If this option is “armed”, the sample is read out for the first event that falls into the specified gate. This is a diagnostics tool to analyze the response of the CRDCs and TPPACs.
The TreeParameter class provides a means of implementing parameters in SpecTcl in a tree-like structure and without the need to specify parameter identification numbers. The parameters are referred to by their names only, which at the same time indicate their location in the tree. This reference mechanism is valid for both the coding part of SpecTcl (C++ code) and the interpreter part (Tcl/Tk shell). It eliminates the confusion induced by the use of numerals to refer to the parameters, and allows the user to organize the parameters in a logical fashion.
(to be set on the “Variables” page of the GUI) for the CRDCs (n=1,2 for crdc1 and crdc2):
The following figures depict some of the S800 SpecTcl spectra used for the tunning of the S800.
Upper left: Three 124Sn charge states in the CRDC2 x-y spectrum
Upper right: Amplitude of the CRDC2 anode signal vs. drift time (this is a diagnostics spectrum showing that the response of the CRDC is not correlated with the y position).
Lower left: Raw drift time measured in CRDC2
Lower right: Charge distribution induced in the pads by the three 124Sn charge states hitting CRDC2.
Before installing the S800 SpecTcl make sure to contact the S800 Device Physicist (Jorge Pereira). In order to install S800 SpecTcl in the S800 computer, follow the following steps:
echo $SPECTCLBINDIRshould give you /user/s800/s800spectcl. If that's not the case, edit .bashrc and define the variable (make sure to source .bashrc afterwards).
git clone email@example.com:pereira/s800spectcl.git -b master(NOTE: the deployment of this repository is password protected. Contact Jorge Pereira (firstname.lastname@example.org), Ron Fox (email@example.com), or Giordano Cerizza (firstname.lastname@example.org) for assistance).
Make -f Make.s800 Install. This Makefile does the following:
gospectclfrom any terminal
This section describes the procedure and scripts (Makefiles) to create a tar file with the S800 SpecTcl source files that any user may need to run S800 SpecTcl by themselves. This tar file contains:
The procedure to deploy this software works as follows:
echo $SPECTCLDEPLOYshould give you /user/s800/s800spectcl_deploy. If that's not the case, edit .bashrc and define the variable (make sure to source .bashrc afterwards).
git clone email@example.com:pereira/s800spectcl.git -b master(NOTE: the deployment of this repository is password protected. Contact Jorge Pereira (firstname.lastname@example.org), Ron Fox (email@example.com), or Giordano Cerizza (firstname.lastname@example.org) for help)
Make -f Make.s800 Deploy. This Makefile does the following:
tar -zcvf $(HOME)/s800spectcl_deploy.tar.gz $(SPECTCLDEPLOY))