EUTelescope Testbeam Analysis: Summer 2014 Tun Sheng Tan JUNE 25 2014 UW Analysis Meeting Summer 2014

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

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.

Exclusive Jet Production Exclusive Higgs Production Diphoton exchange Exclusive photoproduction

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)

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

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

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

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

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

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

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.

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 #12470-12500 Using a larger bin

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.

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

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

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:1104.1858v1 [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