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== 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 ]] == 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 |
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{{ attachment:REFL165_darkcurrent.png}} {{ attachment:REFL165_noiselevel.png}} == LISO fitting code == . [[attachment:REFL165_LISO.fil]] . {{{ # basic manual fitting zero 216.9164194376k ### fitted (name = zero0) zero 3.2000181779M 3.3201166694 ### fitted (name = zero1) zero 603.0023735723M 12.4948023672 ### fitted (name = zero2) # pole+zero pairs for finer fitting zero 176.0561002533M 1.0171946950 ### fitted (name = zero3) zero 1.4696992948M 405.7934822619m ### fitted (name = zero4) # basic manual fitting pole 684.7282048907k 1.2781666253 ### fitted (name = pole0) pole 165.4450171427M 54.3874095177 ### fitted (name = pole1) # pole+zero pairs for finer fitting pole 208.8050567387M 1.1581153281 ### fitted (name = pole2) pole 1.3538031841M 349.3143756987m ### fitted (name = pole3) # Gain and time delay in the loop factor 9.1302650020 ### fitted delay 2.0727760572n ### fitted param zero0:f 1k 1M param zero1:f 2M 5M param zero1:q 0.1 100 param zero2:f 200M 10G param zero2:q 0.1 10000 param zero3:f 170M 1G param zero3:q 0.1 1000 param zero4:f 800k 3M param zero4:q 0 100 param pole0:f 0.5M 1M param pole0:q 0.1 10 param pole1:f 150M 200M param pole1:q 0 1G param pole2:f 200M 1G param pole2:q 0.1 1000 param pole3:f 100k 3M param pole3:q 0 100 param factor 1p 1M param delay 1p 10m fit REFL165.bod absdeg rel rewrite samebetter gnuterm pdf freq log 0.3e6 500M 1000 ### from data file }}} <<BR>> <<BR>> == 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]] <<BR>> <<BR>> == 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}} |
REFL165
Modification history
- Oct/2011 prepared by KA
- Oct/2011 characterization by KA
- Mar/2012 repaired and characterized by SD
Schematics
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
LISO fitting code
# basic manual fitting zero 216.9164194376k ### fitted (name = zero0) zero 3.2000181779M 3.3201166694 ### fitted (name = zero1) zero 603.0023735723M 12.4948023672 ### fitted (name = zero2) # pole+zero pairs for finer fitting zero 176.0561002533M 1.0171946950 ### fitted (name = zero3) zero 1.4696992948M 405.7934822619m ### fitted (name = zero4) # basic manual fitting pole 684.7282048907k 1.2781666253 ### fitted (name = pole0) pole 165.4450171427M 54.3874095177 ### fitted (name = pole1) # pole+zero pairs for finer fitting pole 208.8050567387M 1.1581153281 ### fitted (name = pole2) pole 1.3538031841M 349.3143756987m ### fitted (name = pole3) # Gain and time delay in the loop factor 9.1302650020 ### fitted delay 2.0727760572n ### fitted param zero0:f 1k 1M param zero1:f 2M 5M param zero1:q 0.1 100 param zero2:f 200M 10G param zero2:q 0.1 10000 param zero3:f 170M 1G param zero3:q 0.1 1000 param zero4:f 800k 3M param zero4:q 0 100 param pole0:f 0.5M 1M param pole0:q 0.1 10 param pole1:f 150M 200M param pole1:q 0 1G param pole2:f 200M 1G param pole2:q 0.1 1000 param pole3:f 100k 3M param pole3:q 0 100 param factor 1p 1M param delay 1p 10m fit REFL165.bod absdeg rel rewrite samebetter gnuterm pdf freq log 0.3e6 500M 1000 ### from data file
REFL165 svn repository with all data and fits
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.
