Design of new Shintake monitor

   175, 30 degrees
    add  new angles
           stabilization
          increase the signals

     174 degree   rotating mirrors
       30,  8, 2  degree modes
     30nm - 6um  with 10% meas. errors

     min. beam size ?

     addition of fringe monitor
     Frier analysis to get the phase  
     control by optical delay  path lenght
     goal is 10nm stability

     increase the laser intensity   with rotating mirrors

       How much ?

    H-beam size by laser wire mode  with motorized scanning mirrors
     2.5um - 10um 

   schedule   Oct 31    design complete
   
Q  Honda monitor

Q  How much  frequency ?
A  10 Hz  to stabilize,,  so  pulse by pulse  at 1.5Hz

Q  pointing stability of laser beams
A  fringe stabilization  ,  bu PSD with piezo motion
    2-3um stabilization,  will  be tested .


Q  How stable for the optical table ?
A  10nm level stability is needed,    and  IPBPM to measure the beam pisition
Q   time or frequency ?
     for 1  minute

Q need to access to change modes
A  auto

laser spot size  - 5um,      1/3 of FFTB case  
rotation mirror     x3  
  so, 10 times  

20nm 10% error

Q  5um beam size must be very difficult,  with single lense

A   non Gausisan beam

Q   did you measure spot size ?
     
Q  measurement time ?
A  1 minutes with less background


Beam test of Shintake monitor
    4 layers of 10mm thick scnti,   290mm thick
    S?N separation   by shape
    N (backgrround)    bremmstrahlung
    long. shape is different 

Beam tests
Beam halo
Dump signals

  wire scanner signals   are background at ATF2
   shape to be compared with simulation
   laser wire signal  are signals at ATF2

 schwdule
  one shift /week   11/12-12/21
  11/12-16  : detector check

Q :  Beam halo measurement ?
A :  

Q : separation       if backgrounds are larger  -  does not work,  so. did you estimate the background ?
A : 

Q ; How did you simulate ?
A :  light collection efficiency is not included.   

Q ] When the detector is ready ?
A  October ?