= REFL165 =

== Modification history ==
 * Oct/2011 prepared by KA
 * Oct/2011 characterization by KA 
   * [[http://nodus.ligo.caltech.edu:8080/40m/5671| 40m elog #5671 ]]
 * Mar/2012 repaired and characterized by SD
   * [[http://nodus.ligo.caltech.edu:8080/40m/6333 |40m elog #6333 ]]
 * '''See [[https://nodus.ligo.caltech.edu:8081/40m/8797|Elog 8797]] for the current implementation'''.

== Schematics ==
 [[ attachment:schematic.pdf | schematic and the results of the characterizations in PDF]]

== Characteristics ==
  * DC output / transimpedance: 50 V/A
  * RF output / transimpedance: 12.5 kV/A (on a 50 Ohm load)
  * RF ouput / shotnoise intercept current: 1.45 mA 

{{ attachment:REFL165_impedance.png}}

{{ attachment:REFL165_darkcurrent.png}}

{{ attachment:REFL165_noiselevel.png}}

== LISO fitting code ==

   . [[attachment:REFL165_LISO.fil]]

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== REFL165 svn repository with all data and fits ==

  [[https://nodus.ligo.caltech.edu:30889/svn/trunk/ifomodeling/iscmodeling/40m/40m_RF_System/RF_Photodiodes/REFL165/|REFL165_svn]]

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== Some pictures ==
The first picture shown below is of the damaged photo diode (Feb/2012).

The second picture shows the new PD after the replacement.

{{attachment:damaged_PD.jpg}} {{attachment:replaced_PD.jpg}}