1. Banaras Hindu University
Current Experience, Expression of interest and preliminary preparation for studies on CMS high -η muon upgrade
A.K. Soma
PhD Student
Department Physics
Banaras Hindu University
Varanasi (INDIA)

2. Outline Banaras Hindu University , High Energy Physics Group
Past and Current Experience
Expression of Interest in CMS high – η muon upgrade
My Experience at CERN on CMS
CMS Software.
Understanding of existing Level 1 Trigger
Hardware requirement [VFAT2].

3. Banaras Hindu University

4. BHU – Experimental High Energy Physics Group
Faculty:
Prof. C. P. Singh (QGP Phenomenology)
Dr. B. K. Singh (Experimental HEP)
Dr. V. Singh (Experimental HEP and Neutrino and astropartical Physics)
PhD Students (10)
PHENIX Experiment at RHIC (since 1999)
CBM Experiment at GSI (Germany)
TEXONO Collaboration
Photo emissive materials

5. Past & Current experience
Micro-pattern gas detectors
GEM/THGEM
Detector Simulation (Maxwell, Garfield etc)
Photo emissive materials: CsI, CsBr, Bi-alkali photocathode
High Purity Germanium detectors

6. Expression of Interest
CMS Experiment
Studies on High – η muon Upgrade
Simulation studies towards Trigger efficiency
Micro-pattern gas detector .

7. Project work at CERN on CMS upgrade
Definition of the Problem
CMS Software.
Understanding of existing Level 1 Trigger .
Hardware requirement [VFAT2].

9. Introduction and Installation
=========================================
CMSSW is the software package for CERN CMS Experiment used version is 2_2_10
Connect to lxplus.cern.ch account by using nice account credentials
scramv1 list | grep CMSSW_2_2_10
Checks the existence of the package.
scramv1 project CMSSW CMSSW_2_2_10
Installs the package.
/afs/cern.ch/user/k/kati/scratch0/CMSSW_2_2_10 (on successful installation)
cd CMSSW_2_2_10/src
cmsenv
This will set up runtime variables or environment to start.
To start up the things programs are provided by Piet Verwilligen

10. On Programming and Analyzing
==============================================
The desired programming files (CalibMuon, DQM, Geometry, MyAnalyzers, SimMuon) are placed in the directory CMSSW_2_2_10/src
Precaution: Analyzer file has to be saved separately with some other names (can be as MyAnalyzers)
The main source or program file xyz_pqrs_xxx_cfg.py file is saved in scratch0.
cmsRun xyz_pqrs_xxx_cfg.py will compile the files the results can be seen on the terminal. A log file is also created for error analysis in the same directory. (if something goes wrong.)
ROOT is used to analyze the data.
$ root -l
root[0] gSystem->Load("libFWCoreFWLite.so")
root[1] AutoLibraryLoader::enable()
root[2]new TBrowser b
Then a small window opens up reach the root files and plot the desired objects.
Note:
=====
If your operating system is windows then installation of Xming or Xmanger is necessary to have the analysis in picture or vision mode. Please don’t care about this if you are on LINUX.

11. Cathode Strip Chambers
Global Trigger
Level 1 GBT
Global Muon Trigger
(GMT)
Hadron Calorimeter
Electron Calorimeter
Drift Tubes
Cathode Strip Chambers
Resistive Plate Chambers
4 from barrel Drift Tubes
4 from end cap CSC
8 from RPC’s
4 from end caps+ 4 from barrel
Global Muon Trigger
The selected muon trigger are extrapolated to calorimeter trigger and 4 best muon candidates are selected for the entire CMS and are sent to GBT .

12. VFAT2

13. Quotations
********************************************Stringent design technique to
“deafen the listener”
And
“silence the talker”
have been employed.
********************************************
(from measurements).
All modules of the chip are 100% functionally correct.

14. Introduction ASIC Front – End Electronic Device.
Physical Description of VFAT A Photograph of VFAT2 Chip
0.25 micron CMOS technology chip.
9.43mm X 7.58 mm.
128 bits(Channels)
Dead time free operation with up to 100kHz.
Physics prospective
FAST OR triggering.
Tracking: Precise spatial information for a given
triggered event.
Salient Features of VFAT2
complex digital circuitry on a same piece of Si.
Combination of Low noise amplification and
Different Modes of Operation. Polarity Compatible device.
Masking facility.
Programmable Calibration Unit .
Minimum threshold is 0.7 fC and Maximum is 18.7 fC.
Trigger latencies are allowed up to 6.4 us on the basis of storage capacity.
Data packets are streamed out 40Mbps.

15. Synchronization and Mono-stable Stage Analog and Asynchronous Stage
Data Packet Format
Data Formatter

16. Operation and Measured Results

17. TOTEM Test Platform (TTP) 26cmX10cm card

18. Block Diagram of TTP

19. TTP Software VFAT Controller: FEC Package Based on Qt libraries.
First User Panel:
I2C Components
VFAT Operation
Verification
b. Second User Panel:
to command during
manual test.
c. Third User Panel:
Test Procedure
Selection .

20. TTP Software 2. Analysis Software: TOTEM Online Monitoring Frame work
Qt based Graphical Interface
ROOT Data processing Framework
A hardware Configuration file
A binary data file Input files to the Monitor
A VFAT I2C configuration file

21. Test Procedures

22. Thank You