eprintid: 26365
rev_number: 19
eprint_status: archive
userid: 4392
dir: disk0/00/02/63/65
datestamp: 2019-05-02 07:51:00
lastmod: 2019-06-14 12:03:19
status_changed: 2019-05-02 07:51:00
type: doctoralThesis
metadata_visibility: show
creators_name: Klewin, Sebastian
title: Development of the FPGA-based Raw Data Preprocessor for the TPC Readout Upgrade in ALICE
subjects: ddc-004
subjects: ddc-500
subjects: ddc-530
subjects: ddc-600
divisions: i-130200
adv_faculty: af-13
abstract: ALICE is one of the four major experiments at the Large Hadron Collider (LHC). It is the dedicated heavy-ion experiment and therefore primarily examines the Quark–Gluon Plasma. In order to prepare for the running conditions of 50 kHz lead-lead interactions at the LHC after the Long Shutdown 2 (2018–2021), an extensive upgrade program is carried out. The goal of the upgrade is a continuous readout of the TPC without the need of a trigger. It is essential to reduce the enormous data rate of 3.7 TB/s, generated by the upgraded detector, already during the data taking by a factor of about 60. Otherwise the data volume would exceed the expected available bandwidth and storage capabilities.
In this thesis, an online Cluster Finder (CF) was developed and implemented for FPGAs which processes the whole data volume in real-time during the read out. This is the first step in the data reduction sequence which achieves already a factor of about 5 by keeping only physically relevant information and making use of a better suited data format. In addition to the CF, also the whole data preparation chain was designed and implemented to decode the input data stream, to resort the individual channels to allow for cluster finding and to correct the detector effects in the input signals. All modules which were implemented were extensively simulated to verify their proper functionality. With this, the complete processing chain within the FPGAs was prepared and validated.
date: 2019
id_scheme: DOI
id_number: 10.11588/heidok.00026365
ppn_swb: 1667457020
own_urn: urn:nbn:de:bsz:16-heidok-263650
date_accepted: 2019-04-17
advisor: HASH(0x55fc36bbbb08)
language: eng
bibsort: KLEWINSEBADEVELOPMEN2019
full_text_status: public
citation:   Klewin, Sebastian  (2019) Development of the FPGA-based Raw Data Preprocessor for the TPC Readout Upgrade in ALICE.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/26365/1/thesis.pdf