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KAGRA MIR (Absorption)
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MarcEisenmann - 11:53, Friday 05 April 2024 (3520)Get code to link to this report
T120#1

Installed the 30mm diameter , 120mm thickness sample (1623048-4) called 120#1

I moved z_IU to 18.51mm

pink tape is at bottom towards IU

the sample is held roughly t its central thickness position to limit its tilt that could misaligned the beam on the sensors.

in that configuration, the DC is still varying between about 2 to 5V while changing z from 20 to 120mm...

Pt = 27.0mW ; Pin = 31.3mW

Pt = 4.72W

long z scan at x,y centers : Fri, Apr 5, 2024 11-52-43 AM.txt

Comments related to this report
MarcEisenmann - 13:14, Friday 05 April 2024 (3521)

z edges seem to be at 39 and 90 mm. z_center = 64.5mm

The DC is still slowly decreasing with increasing z from aboiut 5 to 3 V... depending on measurements results I might aligned DC to specific z.

map at z_center : Fri, Apr 5, 2024 1-13-49 PM.txt

MarcEisenmann - 17:13, Friday 05 April 2024 (3522)

z = 54.5mm, Pt = 4.87W ; Fri, Apr 5, 2024 5-12-55 PM.txt

MarcEisenmann - 21:53, Friday 05 April 2024 (3523)

z = 44.5, Pt = 4.87W : Fri, Apr 5, 2024 9-52-57 PM.txt

MarcEisenmann - 10:14, Saturday 06 April 2024 (3524)

z = 74.5,mm, Pt = 4.81W : Sat, Apr 6, 2024 10-14-17 AM.txt