Development of photon detectors for a fast focusing DIRC Field, C.; Hadig, T.; Leith, David W.G.S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2005, Volume:
553, Issue:
1
Journal Article
Peer reviewed
Open access
We report progress in developing a focusing DIRC with very good timing resolution. This basic detector development has been motivated by a possible upgrade of the very successful BaBar DIRC particle ...identification detector for a future Super B-factory. We have built a single bar full size prototype, which aims to reduce the chromatic error by precise timing, and to remove the effect of bar thickness with a focusing mirror. This paper describes the design of the prototype, and systematic studies of the timing resolution and position response for single photons for two 64-pixel detectors: (a) Hamamatsu Flat Panel PMTs, and (b) Burle MCP–PMTs. To test the prototype, we have developed new electronics for ∼300 pixels capable of measuring a single electron timing resolution to ∼100
ps. We also report on a first measurement of aging with the MCP–PMT.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Novel photon detectors for focusing DIRC prototype Field, C.; Hadig, T.; Jain, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2004, Volume:
518, Issue:
1
Journal Article
Peer reviewed
For present BaBar DIRC, the Cherenkov angular resolution is dominated by three contributions—the chromatic error, bar thickness and pixel size. We have designed the Focusing DIRC prototype, which ...potentially can reduce the chromatic error by a precise timing in the range of 50–100
ps per photon, and the bar thickness by a focusing mirror. This paper describes two novel photon detectors, which are candidates for this type of concept: Hamamatsu 64-channel multi-anode Flat Panel H-8500 PMTs and Burle 64-channel micro-channel plate MCP-PMTs. The detectors were tested with a PiLas laser diode light pulse providing 35
ps FWHM timing resolution. A single-photon timing resolution of (1)
σ∼120–140
ps was achieved with the Hamamatsu PMTs, and (2)
σ∼55
ps with the Burle MCP-PMTs. To achieve the good timing resolution results, we have developed a new fast amplifier and a constant-fraction discriminator. We have also developed a computer-controlled scanning setup, which allows a detailed study of the relative efficiency response to single photons.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
3.
Issues on NLO pQCD programs Hadig, Thomas
Journal of physics. G, Nuclear and particle physics,
07/1999, Volume:
25, Issue:
7
Journal Article
Performance of the BaBar-DIRC Schwiening, J.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,
11/2005, Volume:
553, Issue:
1-2
Journal Article, Conference Proceeding
Peer reviewed
Open access
A new type of ring-imaging Cherenkov detector is being used for hadronic particle identification in the BABAR experiment at the SLAC B Factory (PEP-II). This detector is called DIRC, an acronym for ...Detection of Internally Reflected Cherenkov (Light). This paper describes the performance of the DIRC during the first 5 years of operation.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Proceedings of 3rd Workshop on Higher Luminosity B Factories,
Shonan Village, Kanagawa, Japan, 6-7 Aug 2002, pp 36-51 The DIRC, a novel type of Cherenkov ring imaging device, is the primary
hadronic ...particle identification system for the BaBar detector at the
asymmetric B-factory Pep-II at SLAC. It is based on total internal reflection
and uses long, rectangular bars made from synthetic fused silica as Cherenkov
radiators and light guides. BaBar began taking data with colliding beams in
late spring 1999. This paper describes the challenges for the DIRC in a higher
luminosity environment and shows solutions to these challenges.
The DIRC particle identification system for the B aB ar experiment Adam, I.; Aleksan, R.; Amerman, L. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
2005, Volume:
538, Issue:
1
Journal Article
Peer reviewed
A new type of ring-imaging Cherenkov detector is being used for hadronic particle identification in the B
aB
ar experiment at the SLAC B Factory (PEP-II). This detector is called DIRC, an acronym for ...Detection of Internally Reflected Cherenkov (Light). This paper will discuss the construction, operation and performance of the B
aB
ar DIRC in detail.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
This article summarizes a talk presented at the SLAC Summer Institute 2000,
SLAC, Stanford, USA.
The HERA ep collider allows the measurement of the proton structure and tests
of the Standard Model in ...a large region of phase space that has not been
accessible before. Such tests provide the framework for the H1 and ZEUS
Collaborations to look for physics beyond the Standard Model.
The extraction of the parameters of perturbative QCD is one of the main tasks
for the HERA experiments. Studies on the structure of the hadronic final states
with jet algorithms give a direct handle ...on the parton density functions and
the strong coupling strength over a wide kinematic range. In this article, new
results of the H1 and ZEUS collaborations for the strong coupling and the gluon
density in the proton are presented.
This article summarizes a talk given at the International Symposium on
Multiparticle Dynamics 1999 in Providence/USA. It provides an overview on the
variety of measurements of the hadronic final ...state in jet production for
deep-inelastic scattering and photoproduction at HERA.
J.Phys.G25:1470-1472,1999 This paper summarizes a talk presented at the Durham HERA '98 Workshop. We
compare the features that are available in NLO pQCD programs and demonstrate
that understanding ...where in phase space NLO calculations are accurate is vital
for extracting information from measurements at the HERA experiments.
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