What is the acceptance of the detector?

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    Acceptance Detector
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Discussion Overview

The discussion focuses on the concept of "acceptance" in the context of detectors used in high energy physics. Participants explore its definition, implications for detection, and how it relates to various parameters such as angle and energy of particles.

Discussion Character

  • Exploratory, Technical explanation

Main Points Raised

  • One participant seeks clarification on the definition of acceptance in high energy physics detectors.
  • Another participant provides a specific example involving scintillators, detailing the aperture and maximum detectable angle of incidence, and notes that acceptance can be expressed as an integration of aperture over solid angle.
  • A third participant explains that in particle accelerators, acceptance refers to the region where particles can be detected, influenced by mechanical or cost limitations, and that it can also depend on the energy of the particles.

Areas of Agreement / Disagreement

Participants generally agree on the importance of acceptance in detector functionality, but there are nuances regarding its definition and the factors influencing it, indicating that multiple views remain on its application.

Contextual Notes

Some limitations in the discussion include the dependence of acceptance on specific definitions and the potential influence of particle energy on detection capabilities, which are not fully resolved.

tsinghua
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dear all

is there anybody familiar with the definition of the acceptance of detector, especially used in high energy physics? please explain it for me.

Thanks in advance!
 
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If you have two 10-cm diameter scintillators for cosmic rays 1 meter apart, the aperture at zero degrees incidence is about 79 cm2. Also, the maximum detectable angle of incidence is about 0.1 radians (0.01 steradians), but with an elffective aperture of nearly 0 cm2. The most accurate statement of acceptance is an integration of the aperture over the solid angle, giving an answer in cm2-steradians.
 
In particle accelerators, you usually know where the particles collide. The products of these events can now fly in every direction, but you usually cannot (or do not want) detect all products due to mechanical or cost limitations. The region where the particles can be detected is the acceptance. Sometimes the detection depends on the energy of the particles, too - in this case, your acceptance is not just a function of the direction, but of direction and energy of the particle.
 
Thank Bob S and mfb so much. Now I understand it.
best,
tsinghua
 

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