Fall 2014 Commissioning Simulations

Overview

This page is for the organization and sharing of information about simulations for the Fall 2014 Commissioning data.

General Info

• Fall 2014 Commissioning Plan

Discussion Items

• Incoherent beam in bggen - simulate by moving coherent peak, check details of rate/shape (Sean)
• Commissioning target geometry in HDDS/sim-recon (Simon)
• Confirm that the simulation of EM background in HDGeant works for this running (Sean)
  • What gate should be used?
• Decide which version of sim-recon should be used Tag new sim-recon version (Mark)
• Nuclear recoil effects for exclusive modes - later studies if needed
  • Should we include effects for recoil protons?
  • Should we include other recoiling nuclei? (Carbon?)

Conditions

• Software
  • tags/sim-recon-cs1 (provisional name)
  • tags/hdds-cs1 (provisional name)
  • JANA 0.7.2
  • CCDB 1.02
• 200M bggen events with Solenoid @ 0 A and 1200 A
• Assume unpolarized photon beam 1 MHz/GeV at the endpoint

EM Background Simulations

• What is the background rate with no target?
• What is the background rate with various targets?

Hadronic Event Simulations

Overall hadronic rate

Reference: Fall 2014 Commissioning Plan

Assume 50 nA CW electron beam

Hadronic Event Rate

	1.5 µm Al	10 µm Al	30 µm Al
10mm CH2
2mm CH2
2/7mm CH2
3.4mm graphite

Final States

These reactions can be used either as benchmarks due to their large cross section or are interesting to various subdetectors

• γp→π⁺π^-p
• γp→π⁺π^-π⁰(p), π⁰→γγ
• γp→π⁺π^-π⁺π^-(p)
• γp→ηπ⁺π^-(p), η→γγ
• γp→K⁺K^-π⁺π^-(p)
• γp→K⁺Λ, Λ→pπ^-