Problem 1941

Summary:	Cannot use importance sampling for more than one particle type
Product:	Geant4	Reporter:	Daren Sawkey <daren.sawkey>
Component:	geometry/biasing	Assignee:	alexander.howard
Status:	RESOLVED MOVED
Severity:	enhancement
Priority:	P4
Version:	10.3
Hardware:	All
OS:	All

Description Daren Sawkey 2017-02-17 20:36:46 CET

It does not appear possible to use importance sampling for more than one particle type. Another user has given a detailed description in hypernews:

http://hypernews.slac.stanford.edu/HyperNews/geant4/get/biasing_scoring/197.html

I find the same issue with versions 10.2 and 10.3.

Comment 1 alexander.howard 2017-03-06 09:42:36 CET

Thanks for point this out. I need to understand if it's a genuine bug or a design limitation. I'll investigate further.

Comment 2 alexander.howard 2019-07-12 14:18:46 CEST

This is almost certainly an enhanced feature which is in the plan of work for this year within the Biasing Working group. We will also endeavour to see if it can be better resolved using the Generic Biasing approach.

Comment 3 Daren Sawkey 2019-12-17 16:26:20 CET

This is now moved to a feature request.