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PAPER OUTLINE: KAON AEROGEL CERENKOV DETECTOR

INTRODUCTION

• Introduction to physics and infrastructure, i.e., spectrometers in Hall C

M* Cite other experiments (approved) that also require the detector?

DESIGN CONSIDERATIONS

• Experiment requirements and motivation for aerogel detector
• Design choices

 ** threshold vs. RICH
 ** box dimensions and PMT placement etc.
 ** choice of aerogel radiators
 ** impact on other detectors, e.g., delta electrons

CONSTRUCTION AND COUNTER LAYOUT

• Details of the detector box and tray construction

   ** Motivation and explanation of materials used in the construction, i.e., aluminum, honeycomb, etc.
   ** Details on the fabrication and construction
   ** Construction of a frame to hold aerogel in center of box for cases where box not entirely filled

• Short description of detector components

   ** Choice of reflective materials, wires to hold aerogel, etc.
   ** Aerogel used, i.e., manufacturer
   ** PMTs (geometry, properties, details on their installation in detector, i.e., magnetic shielding, aluminum cylinders etc.)

• Construction of a single counter (Prototype) and tests performed with it

AEROGEL STUDIES

• Characterization of aerogel tiles

   ** Variation of dimensions and refractive index tile-to-tile and batch-to-batch
   ** Optical measurements (transmittance etc.)
   ** Photon Yield

PHOTOMULTIPLIER TUBES STUDIES

• Measurements of quantum efficiency and photocathode uniformity

MC SIMULATIONS

• Description of the simulation(s) performed, e.g.,

   ** predictions of photoelectron signal
   ** uniformity of signal
   ** average number of PMTs that trigger per event
   ** timing resolution of detector

• Light collection efficiency

PERFORMANCE

• Results from cosmic measurements

SUMMARY AND OUTLOOK

M* Possibility of improvements: M* - additional tray with even lower refractive index (when material becomes available)