STUDY II Instrumentation for the Neutrino Source
Introduction
We discuss unique features not included in subsystem instrumentation, i.e. Vrf, rf etc.
Target monitoring issues
Beam on target
Beam measurements
Target measurements
Magnet structure (Gohar)
Radiation damage failure modes
Monitoring issues
Magnet coolant (Bartels/Cline)
Corrosion rates determined by ionization in the water
Mitigation methods suggested
Measurement
Phase Rotation / Bunching Line
Cooling line (jn, Solomey, et. al.)
Constraints:
Most of the new problems are involved with the cooling line
Profile monitors with intensity measurements should be sufficient jn, ns
Limited variables require a somewhat minimal instrumentation set
Don’t try to measure emittance at each section
Emittance measurements are difficult and imprecise
Measurements of T and L by profile – phase advance - profile
Emittance matching will be a problem
Mismatches (beta functions)
Breathing modes etc. (LANL data) Paul Lebrun
Alignment
Pencil beams
Special diagnostic sections jn
Beam profile is required
Angular momentum measurements may be necessary
How do we tune L=0 at the end? Chun-xi
Background measurements are required
Backgrounds are not a major problem
X ray / Dark Current Backgrounds (old and new data)
High energy particles need numbers from Mokhov, Simone Norem
Intensity measurements are hard, need not be high precision
Loss monitors are hard (lost particles don’t splash) range/mom
Timing is very useful for measuring L and bucket filling
Tune up and running instrumentation may be different
Muon cooling demonstration has tougher instrumentation problems
Weaker signals
The same backgrounds
Space and access are very limited and close to rf (sketch)
Rf induced backgrounds are severe
Strong B field
Components should be removable from beam, and vacuum chamber Black
Components are large and require big valves
Component heating by the beam is significant
How do we measure polarization?
Tough at these very low energies ?
Instrumentation Options:
Faraday cup / SEM systems jn, ns
Properties and constraints
Geometries and options, exp data
Rigid structures Onel
Scintillators Solomey
Properties
Ion chambers Mayda
Transition radiation? Solomey
Measurements in LH2Bolometers Oreglia,
Cerenkov options Summers,Blondel
Timing techniques Bross,
Semiconductor arrays Plicidi
Accelerator issues (Lebedev, Berg)
Tuning with large beams, use of pencil beams
Transfer functions, loss monitors
Storage ring issues (Parker, Goodman)
Measurement of beam intensity with high precision
Synchrotron mesurements of muon intensity (. Morse)
Costs
Total types, numbers, costs for the facility
the cooling line:
instrumentation in the rest of the facility
Cost Algorithm
Required R&D
Concerns with cooling line instrumentation:
Radiation damage from x-ray / dark currents
Lifetime of components in the Beam
Heating of compononts
A possible way of introducing instrumentation.