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Entry  Sat Jul 2 16:12:49 2016, Antonio, Notes, FSS, FSS : THINGS TO BE DONE (some notes) 
    Reply  Wed Jul 13 10:24:24 2016, rana, Notes, FSS, FSS : THINGS TO BE DONE (some notes) 
       Reply  Wed Jul 13 13:31:33 2016, Evan, Notes, FSS, FSS : THINGS TO BE DONE (some notes) 
          Reply  Wed Jul 13 20:03:07 2016, Antonio, Notes, FSS, FSS : THINGS TO BE DONE (some notes) 
             Reply  Wed Oct 5 14:20:53 2016, awade, Notes, FSS, FSS : THINGS TO BE DONE (some notes) 
                Reply  Wed Jan 4 12:02:51 2017, awade, Notes, EOM, EOM drivers 100_0269.JPG
Message ID: 1736     Entry time: Wed Oct 5 14:20:53 2016     In reply to: 1668     Reply to this: 1800
Author: awade 
Type: Notes 
Category: FSS 
Subject: FSS : THINGS TO BE DONE (some notes) 

Is this as far as we got with this stuff? Are we happy with these choices of frequency or is more analysis/thought needed? There are other things to do too, but if there is lead time with some modifications/parts it may make sense to get going on it so we are ready to go at some later point.

  • We previously obtained a BB EOM driver from Rich Abbott PSL:1090, the documentation is here: DCC-D1200794. These are very quick to change;
  • I believe this is the RF PD used for the acav (south) refcav, acav_rfpd.pdf​. Although, this doesn't seem to indicate what was used in the present 14.75 MHz implementation.  Any changes to these components will be down time to the experiment while we modify the boards;
  • The TTFSS box doesn't appear to need any modifications, see DCC-D0901894, there is an LC circuit in the input line of the LO but I think this is to kill DC/harmonics;
  • Crystals, what Rana thinks we have: PSL:1665. Should also recheck around what we have across labs? We have 36 MHz and 37 MHz unit in the lab right now: PSL:1636

 

Previous analysis:

  •  Antonio Considering cavity of length L=3.45’’=3.68cm and radius of curvatures R1=R2=1m PSL:1633 
  • Evan's analysis for for L = 3.7 cm and R = 0.5 m and  L = 3.7 cm and R = 1 m PSL:1394

Quote:

That is perfectly in agreement with my analysis.

 

36MHz and 37MHz are good according with our analysis if 1MHz separation between the two modulation frequencies is good enough;

If 1MHz separation is not enough than we should consider 34.5MHz and 37MHz. Here the risk is to get close to the order 23 (n+m) at

a nominal detuning frequency that is around 2.2MHz.

 

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