1. EUTelescope Testbeam Analysis: Summer 2014
Tun Sheng Tan
JUNE
UW Analysis Meeting Summer 2014

2. Content Motivation Project Background Objective Progress Issues
- AFP Detector
Objective
Progress
Issues
Future plan
Summary

3. Motivation To investigate
- Central Exclusive Production (CEP)
Photon-photon interaction
Protons will remain intact in the process but it will have less energy
So we want to detect the spatial position of protons undergoing CEP and determine their missing energy.

4. Exclusive Jet Production
Exclusive Higgs Production
Diphoton exchange
Exclusive photoproduction

5. Project Background Atlas Forward Physics detector(AFP)
Identify diffraction of protons from the point of interaction
Using 3D sensor
Require efficiency of 99.9% even at the edge
Slim edge facing beam
About 200m from point of interaction
Must be able to maintain high efficiency in highly non-uniform radiation
R. Staszewskiy, “The AFP Project” (2001)

6. Slimmed edge To reduce amount of dead area on sensor
To minimize the need to overlap sensor and reduce multiple scattering

7. Objective To plot the efficiency map of the sensor
To plot the S-curve for the edge efficiency
To run the analysis over a batch of data

8. Progress Installation of root Setting up EUTelescope Reconstruct track
Setting up Tbmon
Plotting efficiency map
Writing the algorithm to analyze edge efficiency(current)

9. EUDET telescope
*** No cooling box used in my set up

10. To reduce the amount of light impacting on the sensor
Dry Ice
To reduce the amount of light impacting on the sensor
provide insulation from external temperature changes
Polystyrene box that enclosed the DUTs
*** No cooling box used in my set up

11. Overview of Track Reconstruction
EUTelescope is a software that converts RAW data output and a ROOT file with the fitted tracks
Converter
From raw data to LCIO format (Linear Collider In/Out)
Information from a single trigger such as Column, Row, Time Over Threshold, Level 1 Trigger and Readout ID into a single event.
Clustering
Group pixel hits to a cluster
Information of cluster is not store in the ROOT file
Hit maker
Identify the hit position from the cluster
Alignment
Determine the alignment parameters
Fitter
Reconstruct the track using the data from hit maker and alignment
Produce ROOT file

12. Current Result
The ROOT file produced by EUTelescope is analyzed using an offline analysis software called TBMon.
Remove technicalities like loading data, skipping bad data and looping.
Total number of tracks = the number of reconstructed tracks that have matching hit on at least one other DUT
Matched tracks = the total number of tracks that are matched to a hit on the evaluated device.

13. 𝐸𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑐𝑦= 𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑚𝑒𝑎𝑠𝑢𝑟𝑒𝑑 ℎ𝑖𝑡𝑠 𝑐𝑙𝑜𝑠𝑒 𝑡𝑜 𝑎 𝑡𝑟𝑎𝑐𝑘 𝑇𝑜𝑡𝑎𝑙 ℎ𝑖𝑡𝑠 𝑒𝑥𝑝𝑒𝑐𝑡𝑒𝑑
Using AFP_FBK_S5_R10 module
Sensor used is unirradiated
Batch 1 Run #
Using a larger bin

14. Issues EUTelescope compilation error
Required java package not installed on SLC 6
The method used to convert x, y coordinates to row and column has a larger length for row zero and column zero.

15. Future plan Have a working S-curve for the edge efficiency algorithm
Convert the rest of batch 1 raw data to root file to perform analysis
Have EUTelescope installed on SLC6

16. Summary Introduced AFP detector and motivation for the detector
Stated objective of project
Gave an overview of track reconstruction
Talked about progress and current results
Stated the future plan
- Get the analysis algorithm working
- Do the analysis on other set of data

17. Reference
T. Eichhorn, Introduction to EUTelescope and its Analysis Workflow, EUTelescope Workshop 2013
R. Staszewskiy, “The AFP Project", Institute of Nuclear Physics Polish Academy of Sciences, arXiv: v1 [physics.ins-det] 11 Apr 2011
C. Nellist, “Characterisation and Beam Test Data Analysis of 3D Silicon Pixel Detectors for The Atlas Upgrade”, Particle Physics Group School Of Physics and Astronomy University of Manchester, 2013