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PH-EP Technical Notes

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SCIENTIFIC PROGRESS OF THE MC-PAD NETWORK / Aguilar, J (AGH Cracow) ; Ahmed, M I (AGH-UST Cracow) ; Ambalathankandy, P (AGH Cracow) ; Apostolakis, J (CERN) ; Arora, R (GSI) ; Balog, T (GSI) ; Behnke, T (DESY Hamburg) ; Beltrame, P (CERN) ; Bencivenni, G (INFN LNF) ; Caiazza, S (DESY Hamburg) et al. /MC-PAD
MC-PAD is a multi-site Initial Training Network on particle detectors in physics experiments. It comprises nine academic participants, three industrial partners and two associated academic partners [...]
PH-EP-Tech-Note-2013-004.- Geneva : CERN, 2013 - 105 p. Fulltext: PDF;

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Study of a Digital SiPM for TOF-PET / Heller, M (CERN)
The digital Silicon Photomultipliers (dSiPM) from Philips have been used in a study aiming at the proof of principle of an axial positron emission tomography detector with time of flight capabilities. These novel detectors provide various features not present in analog devices. [...]
PH-EP-Tech-Note-2013-003.- Geneva : CERN, 2013 - 12 p. Fulltext: PDF;

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Generation current temperature scaling / Chilingarov, A (Lancaster University, UK) /RD50
The document consists of two RD50 Technical Notes devoted to the temperature scaling of the current generated in Si bulk. The first one (of 9.5.2011) describes the basics of the phenomenon following from the semiconductor physics and recommends the I(T) parameterisation. [...]
PH-EP-Tech-Note-2013-001.- Geneva : CERN, 2013 - 22 p. Fulltext: PH-EP-Tech-Note-2013-001 - PDF PDF (PDFA); PH-EP-Tech-Note-2013-001_4 - PDF (PDFA); PH-EP-Tech-Note-2013-001_2 - PDF; PH-EP-Tech-Note-2013-001_3 - PDF;

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Wavelength-shifting materials for the use in RICH detectors - p-terphenyl and tetraphenyl-butadiene revisited / Koczon, P (GSI Darmstadt (D)) ; Braem, A (CERN (CH)) ; Joram, C (CERN (CH)) ; Solevi, P (ETH Zurich (CH)) ; D¨urr, M (Hochschule Esslingen (D)) ; H¨ohne, C (GSI Darmstadt (D))
P-terphenyl (PT) and tetraphenyl-butadiene (TPB) in form of thin films have been investigated as possible wavelength shifting material for application in Ring Imaging Cherenkov (RICH) detectors. Films of dierent thickness were evaporated onto borosilicate windows of photomultiplier tubes (PMT) and the quantum eciency of the modified PMTs was determined as a function of wavelength. [...]
PH-EP-Tech-Note-2012-003.- Geneva : CERN, 2010 - 5 p. Fulltext: PDF PDF (PDFA);

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Systematic study of RPC performances in polluted or varying gas mixtures compositions: an online monitor system for the RPC gas mixture at LHC / Capeans, M (CERN) ; Guida, R (CERN) ; Mandelli, B (CERN)
The importance of the correct gas mixture for the Resistive Plate Chamber (RPC) detector systems is fundamental for their correct and safe operation. A small change in the percentages of the gas mixture components can alter the RPC performance and this will rebound on the data quality in the ALICE, ATLAS and CMS experiments at CERN. [...]
PH-EP-Tech-Note-2012-002.- Geneva : CERN, 2012 - 14 p. Fulltext: PDF PDF (PDFA);

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Long-term study of optimal gas purifiers for the RPC systems at LHC / Altuntas, E (CERN) ; Capeans, M (CERN) ; Glushkov, I (CERN) ; Guida, R (CERN) ; Hahn, F (CERN) ; Haider, S (CERN) ; Mandelli, B (CERN) ; Rouwette, S (CERN)
This study investigates the impurities produced in the gas of heavily irradiated RPC chambers and the properties of possible purifiers for the closed-loop gas systems used in the LHC experiments. The goal is finding the operational conditions that will keep the RPC gas purity near the level of the fresh gas quality to ensure proper operation of the large RPC systems at high luminosity. [...]
PH-EP-Tech-Note-2012-001.- Geneva : CERN, 2012 - 26 p. Fulltext: PH-EP-Tech-Note-2012-001_2 - PDF; PH-EP-Tech-Note-2012-001 - PDF PDF (PDFA);

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Reliability Tests of Aluminium Wedge Wire Bonding on Auto-catalytic Silver Immersion Gold (ASIG) PCB Metallization / Drozd, A (CERN) ; Honma, A (CERN) ; Kaufmann, S (CERN) ; Manolescu, F (CERN) ; McGill, I (CERN)
The Auto-catalytic Silver Immersion Gold (ASIG) PCB metallization is a new process that has clear advantages for PCB assembly especially with regard to lead-free soldering. As it may become a popular process in the future for electronics used in physics experiments, the quality of this metallization for aluminium wire bonding has been studied. [...]
PH-EP-Tech-Note-2011-002.- Geneva : CERN, 2011 - 13 p. Fulltext: PDF;

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Interstrip resistance measurement / Chilingarov, Alexandre (Lancaster University)
In ATLAS SCT community two methods of interstrip resistance measurements are used: a) measuring the resistance between two strips and comparing it with a separately measured strip-to bias-rail resistance and b) applying DC voltage to one strip and measuring the current flowing to another strip. The method a) will further be referred to as Resistance Method and method b) as Induced Current Method. [...]
PH-EP-Tech-Note-2011-001.- Geneva : CERN, 2010 - 33 p. Fulltext: PDF PDF (PDFA);

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CONTRIBUTION TO THE WLS STUDIES FOR THE AXIAL PET / Chesi, E ; Rudge, A ; Seguinot, J ; Weilhammer, P
Measurements were performed with 2 LYSO bars and 6 WLS strips mounted with the same topological configuration used for the AX-PET demonstrator. The main purposes of the measurements were threefold: (1) to investigate the influence of operational parameters (threshold, gain), (2) to study the effect of the surface property of a screen behind the WLS strips on the photoelectric yield and cluster multiplicity of the WLS strips, and (3) to measure the dependence of the WLS strip response on the gamma energy..
PH-EP-Tech-Note-2010-014.- Geneva : CERN, 2010 - 30 p. Fulltext: PDF;

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Calculation of radiation length in materials / Gupta, Mukund
We introduce an analytical way of finding the radiation length of elements and composites. The values are compared to experimentally measured ones for a selected number of them. [...]
PH-EP-Tech-Note-2010-013.- Geneva : CERN, 2010 - 6 p. Fulltext: PDF;

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