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Towards a Pixel TPC part I: Construction and test of a 32-chip GridPix detector

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-03-08 DOI:10.1016/j.nima.2025.170397

M. van Beuzekom , Y. Bilevych , K. Desch , S. van Doesburg , H. van der Graaf , F. Hartjes , J. Kaminski , P.M. Kluit , N. van der Kolk , C. Ligtenberg , G. Raven , J. Timmermans

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引用次数: 0

Abstract

A Time Projection Chamber (TPC) module with 32 GridPix chips was constructed and the performance was measured using data taken in a testbeam at DESY in 2021. The GridPix chips each consist of a Timepix3 ASIC (TPX3) with an integrated amplification grid and have a high efficiency of about 85% to detect single ionisation electrons. In the testbeam setup, the module was placed in between two sets of Mimosa26 silicon detector planes that provided external high-precision tracking and the whole detector setup was slid into the PCMAG magnet at DESY. The TPC could be operated reliably and used a 95/3/2 gas mixture (by volume) of Ar/CF

4

/iC

_{4}

H₁₀ with a small amount of oxygen and water vapour. The analysed data were taken at electron beam momenta of 5 and 6 GeV/c and at magnetic fields of 0 and 1 T.

The result for the transverse diffusion coefficient

D_{T}

is (287.2 ± 0.5)

μ

\sqrt{cm}

B

= 0 T and

D_{T}

(120.3 ± 0.5)

μ

\sqrt{cm}

B

= 1 T. The longitudinal diffusion coefficient

D_{L}

is measured to be (251 ± 14)

μ

\sqrt{cm}

B

= 0 T and (224 ± 14)

μ

\sqrt{cm}

B

= 1 T. Results for the tracking systematical uncertainties in

x y

(pixel plane) were measured to be 13

μ

m with and without magnetic field. The tracking systematical uncertainties in

z

(drift direction) were 15

μ

m (

B

= 0 T) and 20

μ

m (

B

= 1 T).

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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.