Beamline%20Designer

1
Beamline Designers Perspective on Instrumentation

• a. For any primary beamline
• b. Specific to the NuMI line
• P. Lucas

2
For Any Beamline Need

• Positions
• See incident beam trajectory
• Understand steering of line
• Check for misaligned quadrupoles
• See effects of trims (requires that position
  monitors be located appropriately)

3

• Intensities
• Normalize Physics of experiment
• Provide check on accelerator statistics
• Respect safety envelope

4

• Losses - diagnose serious problems in
• Incident trajectory
• Polarity
• Steering
• Focusing

5

• Profiles
• Understand beamline optics
• Determine emittance and momentum spread
• See scraping from non-Gaussian profiles

6

• Targeting parameters
• Position
• Angle
• Spot size

7
Also need, though non-beam related

• Kicker pulse shape and parameters
• Vacuum readings
• Magnet temperatures
• Tunnel environmental conditions

8
NuMI Specific Requirements

• Very sensitive to losses
• High beam intensity
• Smaller fractional losses matter
• Beam tails, at a level usually not observed,
  could matter
• For downstream parts of line, location in aquifer
• Need losses to be calibrated

9

• Need to be able to measure dp/p
• Vertical dispersion value of 20 meters makes us
  particularly sensitive
• Measure width at low and high dispersion points
• Not known whether there is a dependence on
  intensity

10

• Want beam-based inputs to permit system
• Similar in philosophy to e-berm
• Behaves like an abort in inhibiting future pulses
• Protects groundwater
• Guards against high residual activities

11

• Autotune to be integral to beamline operation
• Requires accurate and reliable position
  information
• Must quantitatively understand effects of trims,
  quad steering included

12

• Details of primary beam targeting can affect the
  Physics of the experiment
• Affect near detector/far detector comparison