Diffusion and drift studies of Ar-DME/CO2/CH4 gas mixtures for a radial TPC in the E &gt; B field

Bittl, X; Eckardt, V.; Fessler, H.; Gong, W. G.; Konrad, Manfred; Mock, A.; Odian, A.; Seyboth, P.; Draper, J. E.; Hildebrandt, Martin; Ness, K. F.; Schmidt, B.

doi:10.1016/s0168-9002(97)00703-1

Cited by 10 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Field change results in different behaviour seen in curves, which in some cases are consistent with expectations determined by the field changes. A surprising result is that although in Ar/CH 4 the Lorentz angle in lower electric field is expected to almost double [32] compared to the main setting, the measurements show that it results into small reduction of transparency to electrons (Figs. 12 vs 16).…”

Section: Discussionmentioning

confidence: 95%

Measurement of the Ion Blocking by the Passive Bipolar Grid

Shulga

Zakharov

Garg

et al. 2021

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

The ion backflow is the main limiting factor for operating time projection chambers at high event rates. A significant effort is invested by many experimental groups to solve this problem. This paper explores a solution based on operating a passive bi-polar wire grid. In the presence of the magnetic field, the grid more effectively attenuates the ion current than the electron current going through it. Transparencies of the grid to electrons and ions are measured for different gas mixtures and magnitudes of the magnetic field. The results suggest that in a sufficiently strong magnetic field, the bi-polar wire grid can be used as an effective and independent device to suppress the ion backflow in time projection chambers.

show abstract

Section: Discussionmentioning

confidence: 95%

Measurement of the Ion Blocking by the Passive Bipolar Grid

Shulga

Zakharov

Garg

et al. 2021

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

show abstract

“…The Ar-CO 2 mixture was stable against sparking with lower concentrations and higher gain compared to the Ar-CH 4 mixture (Table 4). CO 2 has lower diffusion coefficients compared to CH 4 , and is effective at cooling electrons [19] which results in higher density charge clouds. It also has a higher photoabsorption cross section [18,20] compared to CH 4 .…”

Section: H 10mentioning

confidence: 99%

Performance of a MICROMEGAS-based TPC in a high-energy neutron beam

Snyder

Manning

Bowden

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

The MICROMEGAS (MICRO-MEsh GAseous Structure) charge amplification structure has found wide use in many detection applications, especially as a gain stage for the charge readout of Time Projection Chambers (TPCs). Here we report on the behavior of a MICROMEGAS TPC when operated in a high-energy (up to 800 MeV) neutron beam. It is found that neutron-induced reactions can cause discharges in some drift gas mixtures that are stable in the absence of the neutron beam. The discharges result from recoil ions close to the MICROMEGAS that deposit high specific ionization density and have a limited diffusion time. For a binary drift gas, increasing the percentage of the molecular component (quench gas) relative to the noble component and operating at lower pressures generally improves stability

show abstract

“…Magnetic drift velocities and Lorentz angles have been measured for many gases, in view of their relevance for detectors operated in high magnetic fields. Results for carbon tetrafluoride-isobutane and argon-carbon dioxide in equal percentage are given in Figure 4.36 (Ogren, 1995) and Figure 4.37 (Bittl et al, 1997), and for a mixture of several gases with dimethyl ether in Figure 4.38 (Angelini et al, 1994). Other measurements in a range of fast gas mixtures are reported in Kiselev et al (1995) and confirm the general property of 'cold' gases, where electrons remain close to thermal at high fields, to have small magnetic angles.…”

Section: Electron Drift Velocity and Diffusion: Experimentalmentioning

confidence: 99%

“…Figure 4.37 Lorentz angle as a function of perpendicular electric and magnetic fields in Ar-CO 2 50-50(Bittl et al, 1997). By kind permission of Elsevier.…”

mentioning

confidence: 99%

Gaseous Radiation Detectors

Sauli

2014

113

View full text Add to dashboard Cite

Widely used in high-energy and particle physics, gaseous radiation detectors are undergoing continuous development. The first part of this book provides a solid background for understanding the basic processes leading to the detection and tracking of charged particles, photons, and neutrons. Continuing then with the development of the multi-wire proportional chamber, the book describes the design and operation of successive generations of gas-based radiation detectors, as well as their use in experimental physics and other fields. Examples are provided of applications for complex events tracking, particle identification, and neutral radiation imaging. Limitations of the devices are discussed in detail. Including an extensive collection of data and references, this book is ideal for researchers and experimentalists in nuclear and particle physics.

show abstract

Diffusion and drift studies of Ar-DME/CO2/CH4 gas mixtures for a radial TPC in the E > B field

Cited by 10 publications

References 19 publications

Measurement of the Ion Blocking by the Passive Bipolar Grid

Measurement of the Ion Blocking by the Passive Bipolar Grid

Performance of a MICROMEGAS-based TPC in a high-energy neutron beam

Gaseous Radiation Detectors

Contact Info

Product

Resources

About