Diff for "Alignment_Sensing_and_Control"

Differences between revisions 7 and 9 (spanning 2 versions)

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.

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.

-  ⇤ ← Revision 7 as of 2006-11-30 00:36:50 → 
  Size: 668
  Editor: BramSlagmolen
  Comment:
+   ← Revision 9 as of 2006-11-30 21:36:59 → ⇥
  Size: 1803
  Editor: BramSlagmolen
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 15:
-Below are two diagrams which illustrate the proposed method to align the 40m IFO. Currently the
+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''. ||