GSI Forum: Simulation Issues » Question on R3BNeutronTracker2D

Home » R3BRoot » Simulation Issues » Question on R3BNeutronTracker2D (Question on R3BNeutronTracker2D)

Show: Today's Messages :: Polls :: Message Navigator

Re: Question on R3BNeutronTracker2D [message #19366 is a reply to message #19365]

Thu, 07 July 2016 17:51

C. A. Douma
Messages: 88
Registered: September 2015
Location: Groningen

continuous participant

From: *kvi-cart.rug.nl

If I manually add signal neutrons, I cannot observe the realistic case.
Both the probability for a reaction and the probability for background from the unreacted beam are small and
of comparable size. This is why the background causes trouble. If I manually add signal neutrons
to the unreacted beam, the suddenly the signals are so much stronger then the background that the VETO does
more harm then good: if I have for example 0.5% background and 1.5% of the neutrons is detected by the VETO, the VETO will
never help us. But if I have 0.5% background and 0.5% neutrons, then the VETO only blocks 1.5% of 0.5%. Then it might work.

This is also the reason why I asked you about the TGeant4 physics list. I need to really produce the neutrons from a simulated
reaction and I need to take the unreacted beam along to produce the background. And according to Ken Miki, TGeant3 cannot
do this target collisions.

But when I do add these signal neutrons, the tracker works fine, also with the beta test.

Christiaan.

Report message to a moderator

[Message index]

		Question on R3BNeutronTracker2D By: C. A. Douma on Thu, 07 July 2016 15:17
		Re: Question on R3BNeutronTracker2D By: Dmytro Kresan on Thu, 07 July 2016 17:00
		Re: Question on R3BNeutronTracker2D By: C. A. Douma on Thu, 07 July 2016 17:20
		Re: Question on R3BNeutronTracker2D By: Dmytro Kresan on Thu, 07 July 2016 17:42
		Re: Question on R3BNeutronTracker2D By: C. A. Douma on Thu, 07 July 2016 17:51
		Re: Question on R3BNeutronTracker2D By: C. A. Douma on Mon, 11 July 2016 13:26
		Re: Question on R3BNeutronTracker2D By: Dmytro Kresan on Mon, 11 July 2016 14:07
		Re: Question on R3BNeutronTracker2D By: C. A. Douma on Mon, 11 July 2016 15:57
		Re: Question on R3BNeutronTracker2D By: Dmytro Kresan on Tue, 12 July 2016 10:47
		Re: Question on R3BNeutronTracker2D By: C. A. Douma on Wed, 13 July 2016 14:32

Previous Topic:	Tracking energy cut
Next Topic:	Tracks on Event Display

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Jul 03 18:04:22 CEST 2026

Total time taken to generate the page: 0.00783 seconds