PEM injection rehearsal (First)

Introduction

bKAGRA phase1のランの直後に行われるPEMインジェクションに向けて、機器の取扱や解析コード、KAGRA坑内での実験手順の確認などのために、PEMインジェクションのリハーサルを行う必要があった。このページでは、このリハーサルについての情報をまとめる。

Date and place

Participants

Hayama, K.Nagano, H.Tanaka, Miyo (ICRR), Shimoda, Miyazaki (UTokyo), Tanioka (NAOJ), Pil-jong (KGWG, GIST), Shaun Ren (Tokyo Tec.)

Experimental setup

overview pendulum speaker

Injection target

Toy pendulum and photosensor. This corresponds to the interferometer in the real PEM injection.

Sensors

Actuators

Data taking setup

From here, all time is JST.

All data and memo of measurements were stored in Nagano's folder in KAGRA Dropbox (under personal directory)

On 15th Feb. 2018 (13:30-16:30 (JST))

Index

Time (JST)

GPS time

PS pos.

Actuation

Misc

1

About 13:30

N/A

N/A

N/A

Photosensor calibration

2

13:36-13:38

1202704578

a

No actuation

3

13:42-13:45

1202704938

a

Mag 10 Hz sine

4

14:06-14:08

1202706318

a

Mag 4.7 Hz ramp

5

14:17-14:20

1202707038

a

Mag random 3-30 Hz

Filtered by SR560

6

14:28-14:30

1202707798

a

Aco 29 Hz sine

7

14:40-14:42

1202708418

a

Mag 29 Hz sine

Same level magnetic as #6

8

14:48-14:50

1202708898

a

Aco random 3-300 Hz

Filtered by SR560

9

14:56-14:58

1202709378

a

Aco 4.7 Hz ramp

10

15:00-15:21

a

Impulse

For detail see memo in DB

11

15:38-15:42

1202711898

c

Mag 10 Hz sine

12

15:46-15:49

1202712378

b

Mag 10 Hz sine

13

15:55-15:58

1202712918

Far

Mag random 3-30 Hz

PS's circuit coupling

On 16th Feb. 2018 (11:30-13:30 (JST))

Index

Time (JST)

GPS time

PS pos.

Actuation

Misc

1

11:36-11:40

b

Aco 47 Hz sine (amp 22dB)

Input Voltage ~100 V

2

11:45-11:48

b

Aco 47 Hz sine (amp 18dB)

3

11:49-11:52

b

Aco 47 Hz sine (amp 12dB)

4

11:55-11:57

c

Aco 47 Hz sine (amp 12dB)

5

11:58-12:00

c

Aco 47 Hz sine (amp 18dB)

6

12:01-12:03

c

Aco 47 Hz sine (amp 22dB)

7

12:05-12:07

a

Aco 47 Hz sine (amp 12dB)

8

12:08-12:10

a

Aco 47 Hz sine (amp 18dB)

9

12:11-12:13

a

Aco 47 Hz sine (amp 22dB)

10

12:15-12:17

a

No injection

11

12:19-12:21

c

No injection

12

12:23:12:25

b

No injection

13

About 12:30

N/A

N/A

N/A

53 Hz noise hunting

Results

First result just after rehearsal (by Shimoda-kun)

Linear analysis

Sensors' noise budget

Pendulum photosensor noise budget

Spectrograis

Non-linear analysis

Discussion

Comments in evaluation meeting on 16th Feb..