Testing the time resolution of the BESIII end-cap TOF detectors

An, Shaohui; Li, C; Shao, M.; Heng, Y. K.; Chen, H F; Li, X; Sun, Zhi‐Wei; Tang, Z.; Wu, Chong; Wang, Yifang

doi:10.1088/0957-0233/17/10/017

Cited by 16 publications

(11 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A previous study [21] proposed that time resolution is inversely proportional to the square root of the number of photoelectrons. This claim was supported by the fitting parameter n obtained from our data, .…”

Section: B Pqs Block Timingmentioning

confidence: 99%

Timing Performance Evaluation of PMT-Quadrant-Sharing LYSO Detectors for Time-of-Flight PET

Liu

et al. 2011

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

Time-of-flight (TOF) data can improve the imaging quality of positron emission tomography (PET) cameras by estimating the location of the positron annihilation. In this study, we measured the TOF resolution of lutetium yttrium orthosilicate (LYSO) blocks based on the photomultiplier-quadrant-sharing (PQS) design, which has no external light guide and therefore has higher light collection efficiency than the conventional block design with a light guide. We investigated three digital timing methods to achieve better timing resolution: constant fraction discriminationleading edge discrimination, and linear fitting. A time-energy correction, estimated from a least mean square fit, was applied to minimize time walk caused by the variation of signal shapes. The average block-to-block coincidence timing resolution for two 13 13 blocks, each made of 4 4 20 mm 3 LYSO crystals, with fast R9779 PMTs from Hamamatsu (51-mm diameter) was estimated to be 422 ps (full width at half maximum). Another 13 13 block of smaller 1.4 1.4 10 mm 3 LYSO crystals coupled to regular 19-mm-diameter XP1912 PMTs from Photonis was also tested and an average block-to-block timing resolution of 527 ps was achieved. This study shows that with PQS detector blocks, good time resolution suitable for TOF PET systems can be obtained, as well as high spatial resolution and lower PMT costs.

show abstract

Section: B Pqs Block Timingmentioning

confidence: 99%

Timing Performance Evaluation of PMT-Quadrant-Sharing LYSO Detectors for Time-of-Flight PET

Liu

et al. 2011

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

show abstract

“…Beam tests of TOF prototypes have been performed at IHEP E3 beam line using pions, electrons and protons [5,6]. Different scintillator types such as BC404, BC408 and EJ200, with different thickness are tested, together with different wrapping materials.…”

Section: Time-of-flight Systemmentioning

confidence: 99%

The construction of the BESIII experiment

2009

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

show abstract

“…Charged particle identification (PID), especially the ability to distinguish π ± from K ± , plays an essential role in the experimental studies of τ -charm physics. The original end cap time-of-flight (ETOF) system [1,4] consists of two disks of 48 pieces of plastic scintillation counters (BC204) [5][6][7] read out by finemesh photomultiplier tubes (PMT, Hamamatsu R5924), and the solid angle coverage of the ETOF is 0.83 < | cos θ | < 0.93, as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

The study of time calibration for upgraded end cap TOF of BESIII

Guo

Sun

et al. 2017

Radiat Detect Technol Methods

184

View full text Add to dashboard Cite

Purpose The end cap time of flight at Beijing Spectrometer is upgraded with multi-gap resistive plate chamber technology in order to improve the charged particle identification capability. The time-over-threshold is used for the time slewing correction instead of the signal amplitude. Methods The correlation of the multi-peak time-over-threshold and the hit position along the strip of the charged particle is investigated. Implementation of the off-line data calibration method is discussed in detail. Results and conclusion The overall time resolution for pions with momentum around 0.8 GeV/c is about 65 ps.

show abstract

Testing the time resolution of the BESIII end-cap TOF detectors

Cited by 16 publications

References 3 publications

Timing Performance Evaluation of PMT-Quadrant-Sharing LYSO Detectors for Time-of-Flight PET

Timing Performance Evaluation of PMT-Quadrant-Sharing LYSO Detectors for Time-of-Flight PET

The construction of the BESIII experiment

The study of time calibration for upgraded end cap TOF of BESIII

Contact Info

Product

Resources

About