The Mechanical and Thermal Design for the MICE Detector Solenoid Magnet System

Abstract

Abstract-The detector solenoid for MICE surrounds a scintillating fiber tracker that is used to analyze the muon beam within the detector. There are two detector magnets for measuring the beam emittance entering and leaving the cooling channel that forms the central part of the experiment. The field in the region of the fiber detectors must be from 2.8 to 4 T and uniform to better than 1 percent over a volume that is 300 mm in diameter by 1000 mm long. The portion of the detector magnet that is around the uniform field section of the magnet consists of two short end coils and a long center coil. In addition, in the direction of the MICE cooling channel, there are two additional coils that are used to match the muon beam in the cooling channel to the beam required for the detectors. Each detector magnet module, with its five coils, will have a design stored-energy of about 4 MJ. Each detector magnet is designed to be cooled using three 1.5 W coolers. This report presents the mechanical and electrical parameters for the detector magnet system.

Changes made on a 2.7-m long superconducting solenoid magnet cryogenic system that allowed the magnet to be kept cold using 4 K pulse tube coolers

“…These solenoids were designed to produce a uniform solenoidal magnetic field (ΔB/B < 0.003) within 0.4-m diameter warm bore. The good field region is 1.0-m long and 0.3-m in diameter [1]. This uniform field region is occupied by five planes of scintillating fiber detector that measure the position in 3D space of π + , π -, μ + , μ -, e + and e -as they spiral around in the solenoid field.…”

The Inductive Coupling of the Magnets in MICE and its Effect on Quench Protection

“…The tracker module consists of a five-coil superconducting magnet [4]. The three spectrometer coils (End 1, Center, and End 2) are used to generate a uniform 4 T field in a 1-m long region that is 300-mm in diameter.…”

The Mechanical and Thermal Design for the MICE Focusing Solenoid Magnet System

“…The muon emittance will be measured by four planes of scintillating fibers that are in a uniform (to about a percent) solenoidal magnetic field from 2.8 to 4 T [4]. Fig.…”