= POP55 =
== Modification history ==
 * The Dark Ages
 * May 20, 2011 built and characterized by Koji
  * http://nodus.ligo.caltech.edu:8080/40m/4758
  * http://nodus.ligo.caltech.edu:8080/40m/4783

== Schematic ==
[[attachment:POP55_response.pdf|PDF file]]

== Characteristics ==
 * DC output / transimpedance: 10kV/A
 * RF output / transimpedance: 241 V/A (on a 50 Ohm load)
 * RF ouput / shotnoise intercept current: 4.2mA

[[attachment:POP55_response.pdf|PDF file]]

{{attachment:POP55_transimpedance.png}}

{{attachment:current_noise_POP55.png}}

{{attachment:idet_POP55.png}}

== LISO fitting ==

LISO fitting of the RF transimpedance

[[attachment:POP55.fil]]

LISO source file
{{{
zero 45.5409845708k 780.9430917302m  ### fitted (name = zero0)
zero 943.8441860512k 257.8665334188m  ### fitted (name = zero1)
zero 11.1607040662M 2.4173518367  ### fitted (name = zero2)
zero 45.1089218408M 579.4553225008m  ### fitted (name = zero3)
zero 110.8133404447M 55.0520373861  ### fitted (name = zero4)
zero 205.7922426135M 1.6688337734  ### fitted (name = zero5)
zero 443.6707551384M 2.8126750509  ### fitted (name = zero6)
zero 571.4719323825M 484.4663698258M  ### fitted (name = zero7)
zero 571.3746784599M 87.6620628381G  ### fitted (name = zero8)
pole 312.6016900403k  ### fitted (name = pole0)
pole 278.5338484091k 119.4206968023m  ### fitted (name = pole1)
pole 14.4215888229M 163.4334175177m  ### fitted (name = pole2)
pole 15.3338325341M 145.4951949107m  ### fitted (name = pole3)
pole 54.1490019080M 2.5207423098  ### fitted (name = pole4)
pole 108.8870960607M 8.3217170871  ### fitted (name = pole5)
pole 294.5357686938M 1.6722698636  ### fitted (name = pole6)
factor 2.2168718679  ### fitted
delay 999.1312815786f  ### fitted

param zero0:f 10k 1M
param zero0:q 0.1 100
param zero1:f 10k 10G
param zero1:q  0.1 100
param zero2:f 10M 100M
param zero2:q  0.1 100
param zero3:f 10M 1000M
param zero3:q  0.1 100
param zero4:f 10M 1000M
param zero4:q  0.1 100
param zero5:f 10M 1000M
param zero5:q  0.1 1G
param zero6:f 10M 1000M
param zero6:q  0.1 1G
param zero7:f 10M 1000M
param zero7:q  1u 1G
param zero8:f 10M 1000M
param zero8:q  0.1 100G
param pole0:f 10k 1G
param pole1:f 0 100M
param pole1:q  0.1 1000
param pole2:f 10M 100M
param pole2:q  0.1 100
param pole3:f 10M 100M
param pole3:q  0.1 100
param pole4:f 10M 1000M
param pole4:q  0.1 100
param pole5:f 10M 1000M
param pole5:q  0.1 100
param pole6:f 10M 10000M
param pole6:q  0.1 100
param factor 1p 1M
param delay 1p 1m

fit POP55.bod absdeg semi
rewrite samebetter
gnuterm pdf
freq log 100k 500M 1000 ### from data file
}}}