Differences between revisions 149 and 150
Revision 149 as of 2019-03-15 11:07:46
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Editor: NaokoOhishi
Comment:
Revision 150 as of 2019-03-15 11:11:07
Size: 1579
Editor: NaokoOhishi
Comment:
Deletions are marked like this. Additions are marked like this.
Line 9: Line 9:
 In 2017, 5 Type-C suspensions were installed in iKAGRA.<<BR>>
 In the final iKAGRA configuration, 7 mirrors were suspended and 6 of them were Type-C.
In 2017, 5 Type-C suspensions were installed in iKAGRA.<<BR>>
In the final iKAGRA configuration, 7 mirrors were suspended and 6 of them were Type-C.
Line 12: Line 12:
 For the three mirrors of mode cleaner, PO(pick-off) type; MC_i, MC_e, MC_o with the mirror thickness of about 3cm,
 
were installed.

 
The others were TM(test mass) or RM type; ETMX, ETMY with the mirror thickness of about 6cm.
 The last one is coming from CLIO, the size of the BS mirror was 4cm in thickness and 15cm in diameter.
For the three mirrors of mode cleaner, PO(pick-off) type; MC_i, MC_e, MC_o with the mirror thickness of about 3cm, were installed.
The others were TM(test mass) or RM type; ETMX, ETMY with the mirror thickness of about 6cm.
The last one is coming from CLIO, the size of the BS mirror was 4cm in thickness and 15cm in diameter.
Line 18: Line 16:
 Work log about 2 iKAGRA ETMs is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]]. Work log about 2 iKAGRA ETMs is [[KAGRA/Subgroups/VIS/Type-C/iKAGRA_ETM|here]].

Type-C (TAMA) suspension

  • Type-C suspension is a small double pendulum with intermediate mass passively damped by eddy current damping. Some of the type-C suspensions were once used for TAMA300, originally designed by K. Arai in 1990s. So type-C suspension is sometimes called as TAMA-type suspension.
  • Note by K. Arai(2014)

iKAGRA

In 2017, 5 Type-C suspensions were installed in iKAGRA.
In the final iKAGRA configuration, 7 mirrors were suspended and 6 of them were Type-C.

For the three mirrors of mode cleaner, PO(pick-off) type; MC_i, MC_e, MC_o with the mirror thickness of about 3cm, were installed. The others were TM(test mass) or RM type; ETMX, ETMY with the mirror thickness of about 6cm. The last one is coming from CLIO, the size of the BS mirror was 4cm in thickness and 15cm in diameter.

Work log about 2 iKAGRA ETMs is here.

  • ETM Transfer function
  • long term drift

bKAGRA

Drawings

KAGRA/Subgroups/VIS/Type-C (last edited 2020-04-30 12:05:11 by KousekiMiyo)