Ionization Chambers

Boag, J. W.

doi:10.1016/b978-0-12-400402-3.50006-2

Cited by 56 publications

(51 citation statements)

References 133 publications

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“…398 The ionization of the gas contained in the detector is proportional to the energy loss which in tum is approximately proportional to the dose absorbed by the detector. 399 This dose can then be related to the absorbed dose in another medium, such as human tissue, by the ratio of the stopping power of the gas to that bounded by the planes.…”

Section: Iiial Ionization Chambersmentioning

confidence: 99%

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Instrumentation for treatment of cancer using proton and light-ion beams

Chu

Ludewigt

Renner

1993

Review of Scientific Instruments

287

186

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Clinical trials using accelerated heavy charged-particle beams for treating cancer and other diseases have been performed for nearly four decades. Recently there have been worldwide efforts to construct hospital-based medically dedicated proton or light-ion accelerator facilities. To make such accelerated heavy charged-particle beams clinically useful, specialized instruments must be developed to modify the physical characteristics of the particle beams in order to optimize their biological and clinical effects. This article reviews the beam modifying devices and associated dosimetric equipment developed specifically for controlling and monitoring the clinical beams.

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Section: Iiial Ionization Chambersmentioning

confidence: 99%

“…Boag and Currant reported on a two-voltage technique for determining the collecting efficiency of a chamber exposed to pulsed radiatiori. 398 …”

Section: Iiia3 Ionization-chamber Design Considerationsmentioning

confidence: 99%

Instrumentation for treatment of cancer using proton and light-ion beams

Chu

Ludewigt

Renner

1993

Review of Scientific Instruments

287

186

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“…An estimate of recombination based on calculations by 1.W Boag with an empirical coefficient relevant to ion-ion recombination in air at normal pressure and temperature [29] results in a 0.15% effect on signal amplitude at 100 rad/s. Our extrapolation of this result to electron-ion recombination in 100 atm Ar indicates a five times higher figure, which is still too small to be of concern.…”

Section: Space Charge Effect and Recombinationmentioning

confidence: 99%

A high-pressure gas-ionization tube calorimeter for forward detectors

Khazins

Demortier

Giokaris

et al. 1993

Nuclear Instruments and Methods in Physics Research Section A:

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A calorimeter design based on high-pressure gas-ionization tubes arranged nearly parallel to the incident particle direction is described. Energy, time, and position resolutions of such a calorimeter, as well as its radiation hardness and elecuonic noise, are discussed. Resulting characteristics meet the needs of the forward calorimetry for SSC and LHC collider experiments, and seem promising for application in orher, more central parts of these experiments.lalso INFN Pisa, I-56010 Pisa, Italy 2

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“…The ion chamber dynamic range is limited by leakage currents at the low end, and by charge recombination at the high end [3]. Good guard-ring design will limit leakage currents to 1 pA or less.…”

Section: Gas Lonization Chambersmentioning

confidence: 99%