On timing properties of LYSO-based calorimeters

Anderson, D.; Apresyan, A.; Bornheim, A.; Duarte, J.; Peña, C.; Ronzhin, A.; Spiropulu, M.; Trevor, J.; Xie, S.

doi:10.1016/j.nima.2015.04.013

Cited by 23 publications

(17 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An MCP-PMT was used as a photo detector for the LYSO cube and both MCP-PMTs and SiPMs for the SH cell. A resolution of 32 ps was measured for the LYSO cube with 32 GeV electrons and 48 ps for the SH cell with 200 GeV electrons [8]. The output signal of the photo detectors were not amplified in these setups, which limits the timing performance towards low signal amplitudes due to the noise of the readout electronics.…”

Section: Calorimeter Precision Timingmentioning

confidence: 99%

See 1 more Smart Citation

On the Usage of Precision Timing Detectors in High Rate and High Pileup Environments

Bornheim¹

2017

Proceedings of the 25th International Workshop on Vertex Detectors — PoS(Vertex 2016)

View full text Add to dashboard Cite

High energy particle collider experiments are facing ever more challenging conditions, operating at todays accelerators capable of providing instantaneous luminosities of 10 34 cm −2 s −1 and above. The high center of mass energy, the large number of simultaneous collision of beam particles in the experiments and the very high repetition rates of the collision events pose huge challenges. They result in extremely high particle fluxes, causing very high occupancies in the particle physics detectors operating at these machines. A precise timing information with a precision of around 10 ps and below is seen as a major aid in the reconstruction of the physics events under such challenging conditions. In this paper I discuss applications of precision timing in high pile-up conditions and review the efforts of the LHC collaborations to augment the timing performance of their detectors during future upgrade campaigns. Different detector technologies allowing precision timing measurements will be discussed and their potential benefit for a holistic event reconstruction will be illustrated.

show abstract

Section: Calorimeter Precision Timingmentioning

confidence: 99%

“…3, LYSO is well suited for precision timing measurements due to its very high light yield and very fast signal rise time [8,21]. The energy deposited in 1 mm of LYSO by a charged particle is about 1 MeV which results in the creation of about 30000 scintillation photons.…”

Section: Lyso Based Detectors With Sipm Readoutmentioning

confidence: 99%

On the Usage of Precision Timing Detectors in High Rate and High Pileup Environments

Bornheim¹

2017

Proceedings of the 25th International Workshop on Vertex Detectors — PoS(Vertex 2016)

View full text Add to dashboard Cite

show abstract

“…Reference Photodetector Figure 9.2: The basic schematic diagram of the experimental setup for a typical time of flight measurement is shown to illustrate the basic detector elements [241]. One photodetector is used as a time reference and the second measures energy and time simultaneously.…”

Section: Calorimetric Signal Photodetectormentioning

confidence: 99%

“…A detailed explanation of the figure format is given in the caption of [227,44]. A detailed explanation of the panels is given in the caption of flight measurement using the LYSO-tungsten shashlik calorimeter with signal extraction from the edges of two LYSO plates, along with a picture of the experimental setup [241]. .…”

mentioning

confidence: 99%

“…184 9.13 A photograph of the two exposed LYSO layers in the shashlik cell. The scintillation light signal is extracted by optically coupling the edges of these two exposed LYSO layers to MCP-PMT photodetectors [241] 3 LYSO cube (blue), and the LYSO-tungsten shashlik calorimeter with light extracted using DSB1 fibers (red) [241]. The expected background and its uncertainty (multiplied by a factor of two as explained in the text) compared to the best-fit signal distribution in the HighRes box for two particular mass points, m b 1 = 500 GeV and m b 1 = 800 GeV, in model B [44].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Naturalness confronts nature: searches for supersymmetry with the CMS detector in pp collisions at √s = 8 and $13$ TeV

Duarte¹

2017

View full text Add to dashboard Cite

All rights reserved. I thank Maurizio Pierini for his intense mentorship beginning at CERN in 2011 and continuing to this day. Maurizio taught me how to be a modern particle physicist, by sharing his expertise in computing, statistics, and phenomenology. He was also invaluable in helping me prepare this manuscript. ABSTRACTIn this thesis, we present two inclusive searches for supersymmetric particles at √ s = 8 and 13 TeV using the razor variables and guided by the principle of naturalness. We build a framework to explore the natural supersymmetry parameter space of gluino and top squark masses and branching ratios, which is a unique attempt to cover this parameter space in a more complete way than ever before using LHC data. With this approach, the production of top squarks and gluinos are excluded below ∼ 700 GeV and ∼ 1.6 TeV, respectively, independent of the branching ratios, constituting one of the tightest constraints on natural supersymmetry from the LHC. Motivated by the need to mitigate the effects of multiple interactions per bunch crossing (pileup), an essential feature of present and future hadron colliders, in this thesis we also study the precision timing capabilities of a LYSO-based sampling calorimeter, and achieve a time resolution of ∼ 30 ps in electron test beam measurements. The achieved resolution corresponds to the precision needed to significantly reduce the inclusion of pileup particles in the reconstruction of the event of interest. This study is foundational in building an R&D program on precision timing for the high-luminosity LHC and other future hadron colliders. We also propose alternative simplified models to study Higgs-plus-jets events at the LHC, and reinterpret an excess observed at 8 TeV in the context of these models. Finally, we discuss a search for narrow resonances in the dijet mass spectrum at 13 TeV using the data-scouting technique at CMS, which records a smaller event format to increase the maximum recordable rate. For the benchmark models with a vector or axial-vector mediator that couples to quarks and dark matter particles, the dijet search excludes mediator masses from 0.5 TeV up to ∼ 2.7 TeV largely independent of the dark matter particle mass, which constitutes a larger exclusion than traditional mono-X searches at the LHC. In the plane of the dark matter-nucleon interaction cross section versus dark matter mass, the dijet search is also more sensitive than direct detection experiments for spin-dependent cross sections. J. M. G. D. performed the maximium-likelihood-fit-based background estimation and statistical interpretation using CMS data for this analysis and contributed to writing the manuscript for publication.[3] D. Anderson et al. "On timing properties of LYSO-based calorimeters".

show abstract

Precision timing calorimeter for high energy physics

Anderson

Apresyan

Bornheim

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

Scintillator based calorimeter technology is studied with the aim to achieve particle detection with a time resolution on the order of a few 10 ps for photons and electrons at energies of a few GeV and above. We present results from a prototype of a 1.4x1.4x11.4 cm 3 sampling calorimeter cell consisting of tungsten absorber plates and Cerium-doped Lutetium Yttrium Orthosilicate (LYSO) crystal scintillator plates. The LYSO plates are read out with wave lengths shifting fibers which are optically coupled to fast photo detectors on both ends of the fibers. The measurements with electrons were performed at the Fermilab Test Beam Facility (FTBF) and the CERN SPS H2 test beam. In addition to the baseline setup plastic scintillation counter and a MCP-PMT were used as trigger and as a reference for a time of flight measurement (TOF). We also present measurements with a fast laser to further characterize the response of the prototype and the photo sensors. All data were recorded using a DRS4 fast samplig digitizer. These measurements are part of an R&D program whose aim is to demonstrate the feasibility of building a large scale electromagnetic calorimeter with a time resolution on the order of 10 picoseconds, to be used in high energy physics experiments.

show abstract

On timing properties of LYSO-based calorimeters

Cited by 23 publications

References 7 publications

On the Usage of Precision Timing Detectors in High Rate and High Pileup Environments

On the Usage of Precision Timing Detectors in High Rate and High Pileup Environments

Naturalness confronts nature: searches for supersymmetry with the CMS detector in pp collisions at √s = 8 and $13$ TeV

Precision timing calorimeter for high energy physics

Contact Info

Product

Resources

About