A gas electron multiplier gem is a type of gaseous ionization detector used in nuclear and. The avalanche is able to produce enough electrons to create a current or charge large enough to be detected by electronics. Electron multipliers from agilent crawford scientific. Dose imaging detectors for radiotherapy based on gas electron. We describe operating principles and results obtained with a new detector element. The gem gas electron multiplier technology, which has been introduced by f. A gas electron multiplier is a type of gaseous ionization detector used in nuclear and particle physics and radiation detection. Sauli 1 consists of high density holes etched in 50. On application of a difference of potential between the two electrodes, electrons released by radiation in the gas on one side of the structure drift into the holes, multiply and transfer to a collection region.
All gaseous ionization detectors are able to collect the electrons released by ionizing radiation, guiding them to a region with a large electric field, and thereby initiating an electron avalanche. Development of gating foils to inhibit ion feedback using fpc. Sauli in 1996 and is in use in high energy and medical physics, provides the possibility to avoid the problems mentioned on the pages about wire amplification. A gas electron multiplier gem consists of a thin, metalclad polymer foil, chemically pierced by a high density of holes. By using our services, you agree to our use of cookies.
The basic component of the device is a metalcoated thin insulating foil, chemically pierced with a high density of holes, typically 50100 per square millimeter. When a voltage is applied between the metalized electrodes, a strong electric field is created inside the holes. We describe operating priciples and results obtained with a new detector component. Pdf we describe operating principles and results obtained with a new detector element. The gem belongs to the family of holetype detectors made of a dielectric sheet metalized on both sides with a matrix of holes through it. A range of electron multipliers for agilent icpms systems and dual detectors for perkinelmer icpms systems. The recently introduced gas electron multiplier gem offers a way to improve on this crucial point. In order to not overwhelm the daq with irrelevant beaminduced signals. The gas electron multiplier gem is a proven amplification technique for position detection of ionising radiation such as charged particles, photons, xrays and. The standard gas electron multiplier gem invented by f.
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