Diff for "Alignment_Sensing_and_Control"

⇤ ← Revision 9 as of 2006-11-30 21:36:59 →

Size: 1803

Editor: BramSlagmolen

Comment:

← Revision 18 as of 2010-06-01 22:39:07 → ⇥

Size: 107

Editor: KojiArai

Comment:

Deletions are marked like this.

Additions are marked like this.

----
* Design and ASC scheme after we design one for AdvLIGO
* Implement and test the new InGaAs, in-vac, high power, FTC WFS. The 40m WFS need not be
in-vac, but they should be packaged as such.
* Measure spring stuff
----
[[Simulink Model of 40m Optical Springs]]
----
This file attachment:40m.pdf contains some results for the 40m ASC sensing matrix.

[[RF ASC|RF based alignment & sensing control]]

The input for this calculation was taken from 40m web page: http://www.ligo.caltech.edu/~ajw/40m_upgrade.html. The loss per optic was increased from 37.5 ppm to more realistic 100 ppm.

== DC Alignment ==

Below are two diagrams which illustrate the proposed method to align the 40m IFO while it is locked. Currently the controls are done using Perl scripting.

inline:DC_ASC_Inline.png
'''Figure 1'''. Diagram of the 40m IFO in-line arm cavity.

'''In-line Labels:'''
|| IP_POS || Otherwise known as PZT1, located in front of the PRM. Steers the beam into the IFO. ||
|| IP_ANG || Otherwise known as PZT2, located after IP_POS and before the PRM. Also, steers the beam into the IFO. ||
|| ITMx || The ITM of the x-arm, ITMX. ||
|| ETMy || The ETM of the x-arm, ETMY. ||
|| PDH-err || The demodulated length control signal, ''C1:LSC-XARM_IN1''. ||
|| TRX || The transmitted power of the x-arm, ''C1:LSC-TRX_OUT''. ||

inline:DC_ASC_Perp.png

'''Perpendicular Labels:'''
|| IP_POS || Otherwise known as PZT1, located in front of the PRM. Steers the beam into the IFO. ||
|| IP_ANG || Otherwise known as PZT2, located after IP_POS and before the PRM. Also, steers the beam into the IFO. ||
|| ITMx || The ITM of the x-arm, ITMX. ||
|| ETMy || The ETM of the x-arm, ETMY. ||
|| PDH-err || The demodulated length control signal, ''C1:LSC-XARM_IN1''. ||
|| TRX || The transmitted power of the x-arm, ''C1:LSC-TRX_OUT''. ||

[[Dither ASC|Dither based alignment & sensing control]]

-  ⇤ ← Revision 9 as of 2006-11-30 21:36:59 → 
  Size: 1803
  Editor: BramSlagmolen
  Comment:
+   ← Revision 18 as of 2010-06-01 22:39:07 → ⇥
  Size: 107
  Editor: KojiArai
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-----
 * Design and ASC scheme after we design one for AdvLIGO
 * Implement and test the new InGaAs, in-vac, high power, FTC WFS. The 40m WFS need not be
    in-vac, but they should be packaged as such.
 * Measure spring stuff
----
 [[Simulink Model of 40m Optical Springs]]
----
This file attachment:40m.pdf contains some results for the 40m ASC sensing matrix.
+[[RF ASC|RF based alignment & sensing control]]
-Line 11:
+Line 3:
-The input for this calculation was taken from 40m web page: http://www.ligo.caltech.edu/~ajw/40m_upgrade.html. The loss per optic was increased from 37.5 ppm to more realistic 100 ppm. 
 
== DC Alignment ==
-Line 15:
+Line 4:
-Below are two diagrams which illustrate the proposed method to align the 40m IFO while it is locked. Currently the controls are done using Perl scripting.

inline:DC_ASC_Inline.png
           '''Figure 1'''. Diagram of the 40m IFO in-line arm cavity. 

'''In-line Labels:'''
|| IP_POS || Otherwise known as PZT1, located in front of the PRM. Steers the beam into the IFO. ||
|| IP_ANG || Otherwise known as PZT2, located after IP_POS and before the PRM. Also, steers the beam into the IFO. ||
|| ITMx   || The ITM of the x-arm, ITMX. ||
|| ETMy   || The ETM of the x-arm, ETMY. ||
|| PDH-err || The demodulated length control signal, ''C1:LSC-XARM_IN1''. ||
|| TRX || The transmitted power of the x-arm, ''C1:LSC-TRX_OUT''. ||

inline:DC_ASC_Perp.png

'''Perpendicular Labels:'''
|| IP_POS || Otherwise known as PZT1, located in front of the PRM. Steers the beam into the IFO. ||
|| IP_ANG || Otherwise known as PZT2, located after IP_POS and before the PRM. Also, steers the beam into the IFO. ||
|| ITMx   || The ITM of the x-arm, ITMX. ||
|| ETMy   || The ETM of the x-arm, ETMY. ||
|| PDH-err || The demodulated length control signal, ''C1:LSC-XARM_IN1''. ||
|| TRX || The transmitted power of the x-arm, ''C1:LSC-TRX_OUT''. ||
+ [[Dither ASC|Dither based alignment & sensing control]]