SY120 to the Meson Test Facility (and KTeV?)

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SY120 to the Meson Test Facility (and
KTeV?) - Chuck Brown 23Feb04 June/08
MTest

MCenter
KTeV Hall (proposed for E906)
P2
P1
MI52
P1 ? P2 ?
3 km beam line from MI52 to MT6 and MC7 2.5 km
from MI52 to KTeV Hall http//home.fnal.gov/chuc
kb/KTeVBeam.ppt
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• 120 GeV proton beam to the KTeV Hall
• An 800 GeV proton beam which created a secondary
  neutral kaon beam was most recently delivered to
  KTeV hall in 1999
• The 1999 beam line contained one large
  superconducting string of dipoles. Since then,
  the lab has decommissioned the cryogenic system
  in the Switchyard. Fortunately, we can deliver
  120 GeV beam with normal magnets (after some
  reconfiguration).
• The renovation of the Switchyard to deliver an
  intense 120 GeV proton beam to the KTeV Hall will
  be an Accelerator Division Project. It can be
  done mostly while the Tevatron is running.

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Extracted 120 GeV proton beam line to KTeV Hall
Encl-NM3 KTeV Hall
Encl-NM2
Encl-NM1
Encl-G2
Encl-G2
lt1e12 to MTest
Encl-G1
Encl-C
Enclosures in RED must be modified To transmit
120 GeV protons
Encl-B
High Intensity 120 GeV To Pbar Production
- 14 dia. Underground beam pipe
Transfer Hall
To Tevatron
P3
P2
Main Injector
P1
4
Counting Room
Last quad doublet about 200 upstream
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• Time structure of the 120 GeV proton beam.
• The Main Injector RF operates at 53 MHz
• thus the beam is bunched in 1 nsec long pulses
  every 19 nsec.
• RF timing signal is available at the experiment
  makes timing counters easy!
• Can be used to clock the electronics
• The circumference of the MI is about 10 µsec.
  thus there is
• an injection gap every 10 µsec.
• There is an random variation of the resonant slow
  extraction
• intensity due to magnet ripple, beam
  oscillations, etc. This leads
• to a gross duty cycle of less than 50.
• I.e. 2 uncorrelated counters, each counting 0.1
  of the beam would have a
• randoms rate of 1e-6 if duty cycle was 100 - can
  realistically expect 2-3e-6
• randoms because beam is not perfectly random in
  time.