Message: Re: Reference physics lists + StepLimiter Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

More Re: Reference physics lists + StepLimiter 

Forum: Physics List
Re: None Reference physics lists + StepLimiter (Kyrre Ness Sjøbæk)
Re: Note Re: Reference physics lists + StepLimiter (Kyrre Ness Sjøbæk)
Re: Idea Re: Reference physics lists + StepLimiter (Vladimir Ivanchenko)
Re: Ok Re: Reference physics lists + StepLimiter (Kyrre Ness Sjøbæk)
Re: None Re: Reference physics lists + StepLimiter (John Allison)
Date: 28 Jan, 2010
From: Vladimir Ivanchenko <Vladimir Ivanchenko>

Hello John,

For a silicon detector we have following processes:

1) energy loss of changed particles; because silicon layer is thin fluctuations are close to Landau.

2) energy deposition is not equal to the energy loss because energetic delta-electrons leave this thin layer; energy deposition has a tail but the shape is not the same as for the energy loss.

3) electron/hole creation inside sensitive volume; in litrature there is established value 3.66 eV per pair for silicon; number of pairs fluctuate with Gaussian widths smaller that typical 1/sqrt(N) - corresponding factor also empirical.

4) processes of drifting and shape of electronic signal very depend on a concrete detector and electronic chain.

Geant4 provides simulation of 1) and 2) and as you correctly mension a helper class to make 3). This helper class depends on two constants specific for each material. In general, 3) and 4) should be done in user digitisation code.

VI

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 Ok: Re: Reference physics lists + StepLimiter   (Kyrre Ness Sjøbæk - 29 Jan, 2010)
(_ None: Re: Reference physics lists + StepLimiter   (Colin Paul Gloster - 29 Jan, 2010)
 Add Message Add Message
to: "Re: Reference physics lists + StepLimiter"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews


[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]