MICE Target Development Lara Howlett University of Sheffield.

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Presentation transcript:

MICE Target Development Lara Howlett University of Sheffield

Contents Progress of mechanical design and assembly Development and future plans for electronics Optical readout system Software development Results

Mechanical Design Drawing by Stephanie Yang

Progress on hardware 2 new shuttle bodies have been built 1 new stator body is complete, and the parts for a second are at Sheffield 8 ceramic tubes have been manufactured 1 shuttle body cleaned in ultrasonic bath and awaiting testing at RAL Indium seal test successfully carried out at RAL Work on support structure for target is underway at RAL

Actuator parts

Target stand

Power electronics After several prototypes a driver that could supply a current of 20KHz to the actuator was built We will need an actuator that can deliver 40A plus for full acceleration

Control electronics Currently using hall switches to provide position used by control Now able to run in single pulse mode 4 modes:  Park  Hold  Activate Enable  Activate

Current Electronics Positional Decoder/Switching Logic Optical Isolators Hex Bridge A A A’A’ A’A’ B’ B B CCC’C’ C’C’ A A A’A’ A’A’ B B CCC’C’ C’C’

Video Clip

Optics An optical system has been developed to provide sensitive (0.15mm) position measurement The system consists of 3 lasers beams and a graticule One side of graticule has a fine comb and with 2 lasers provides position readings Other side has 1 fin and 1 laser and provides an index marker

Optics

Electronics for optics Electronics has been developed to read optics channels and provide an 8 bit position measurement A free running clock which is latched everytime there is a change in position has also been developed

Future Electronics

Software development DAQ writes individual pulses to file Online monitoring  Analysis of individual pulses Position, velocity, acceleration  Analysis of trends over time Dip depth, max acceleration…

Software

New setup Actuator has now been mounted vertically First results have been taken in the last few days with this setup

Results at 5A Shuttle hitting bearing Results in sharp change In velocity

Results at 5A Smooth pulse bottom achieved

Results - reproducibity

Conclusions Work on building a system suitable for use in ISIS is progresing Optics system successfully developed First results from this show:  Nice pulse shape can be achieved  Good reproducibility Next generation of control electronics should provide much finer control Next generation driver electronics is needed to achieve full acceleration