Date: Mon, 12 Apr 2021 08:21:53 +0000
Dear FLUKA experts.
I found some strange K+ production.
I would like to update my old calculations. I simulated Au beam _at_ 11 AGeV and 250 µm Au target in magnetic field.
The field integral is 1 Tm over a distance of ± 0.5 m around the center, with a maximum field value of 1 T.
I used default settings for heavy ions from FLAIR:
* Enable full transport of heavy and light ions
DPMJET 1.
PHYSICS 2. EM-DISSO
* Set thresholds for pair/bremsstrahlung
PAIRBREM 3. 0.0001 HYDROGEN _at_LASTMAT
IONTRANS HEAVYION
* Set thresholds for delta ray production
DELTARAY HYDROGEN _at_LASTMAT
I found some jet in charged particle distribution (XY) at 1.5 m from the target (see chargedParticles.png).
This jet comes from K+, which I didn't see earlier (see piK.png). I calculated energy spectra in target (E_piK.png).
I cannot understand the two peaks in the energy distribution for K+. The high energy peak is exactly the jet, which appears in new FLUKA version.
Is it expected? I need to explain the increase the charged particle rate in the detectors due to this jet to my colleagues.
Best regards
Anna
______________________________________
Dr. Anna Senger
Office KBW 2.01
Tel. +49(0)615971 1844
E-Mail A.Senger_at_gsi.de
FAIR - Facility for Antiproton and Ion Research in Europe GmbH
Planckstr. 1
64291 Darmstadt
DEUTSCHLAND
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(image/png attachment: chargedParticles.png)
(image/png attachment: piK.png)
(image/png attachment: E_piK.png)