Date and Time: Tuesday, 14 November 2017, at 11:00 AM

Venue: room 310, Laboratory of Information Technologies

Seminar topic: «Precise Coordinate Reconstruction in the Cathode Strip Chambers of the CMS Experiment»

Authors: V. Palichik ¹, A. Shishkin ², N. Voytishin ¹

(¹ – LIT JINR, ² – Saint Petersburg State University)

Speaker: A. Shishkin

Abstract:

The Run2 of the Large Hadron Collider (LHC) that we are facing now is characterized with a higher luminosity, pile-up and energy of the passing particles. This imposes new challenges almost to every part of all the systems that form the CMS experiment. The Cathode Strip Chambers (CSCs) are one of these parts. The strip coordinate on a particular layer of a CSC is reconstructed with а bad accuracy (30-60% of strip width while the required precision is 1-3%) in cases of high multiplicity of fired strips. This is due to the fact that for a cluster that is formed out of overlapping signals a simple Center of Gravity (CoG) approach is used for coordinate reconstruction by the standard procedure. The development of a new wavelet-based reconstruction algorithm for the strip coordinate was initiated in order to improve its precision. Comparison results of the two algorithms are shown along with visualization of particular Monte-Carlo event examples.