Ground Motion Measurement in Accelerator Test Facility at KEK

Chigasaki Research Institute J-Power / Electric Power Development Co.,Ltd.

Ground Motion Measurementin Accelerator Test Facility

at KEK

･ KEK･ ICEPP (Univ. of Tokyo)

･ J-Power


【 Research Team and Members 】

(KEK)R.Sugahara, S.Takeda,M.Yoshioka, H.Yamaoka

(J-Power)

T.Itoh, K.TadaY.Nakayama

(ICEPP)

S.KomamiyaS.Yamashita

Joint Research


【 Contents of the measurement 】①Huddling test ②Measurement

around the beam line

- Natural frequency of the trestle ?

- Movement and operation of instruments

- Ground Motion in Accelerator Test Facility ?


【 Measurement Instrument 】

- Servo type velocity meter “VSE355G2” -(manufactured by Tokyo Sokushin Co.,Ltd.)

Type VSE-355G2Frequency Band 0.012～70　 Hz

Component Horizontal：2, Vertical：1Range 200kine、2000gal

Sensitivity 100mV/kine（2× 50mV/kine）and 2.5V/kine

Resolution 10-6galDamping 100％Range of

Temperature－30℃～70℃

Allowed Acc. 30G（<0.1sec）

- Specification -


- Measurement Points -

30 minutes consecutive duration for 12 hours6pm, Feb. 9, 2004 - 6am, Feb. 10, 2004

P1JP1JP2JP2J

P3JP3J P4JP4J

【 Huddling Test (1) 】

- Observation -


- Power Spectrum Density and Coherence -


Component : X ( Orthogonal to the beam line )




Component : Y ( Parallel to the beam line )




Component : Z ( Vertical )


30 minutes consecutive duration for 28 hours2pm, Feb. 10, 2004 – 6pm, Feb. 11, 2004

【 Measurement around the beam line (1) 】

P1JP1J

P2JP2JP3JP3J

P4JP4J

P1JP1J

P2JP2JP3JP3J

P4JP4J

- Measurement Points -

- Observation -



Daytime12:00-12:30, Feb. 11, 2004

Nighttime22:00-22:30, Feb. 10, 2004

P1J

P2J

P3J

P4J

“ Time Series in Velocity (1) “




P1J

P2J

P3J

P4J



Daytime12:00-12:30, Feb. 11, 2004

Nighttime22:00-22:30, Feb. 10, 2004


Component : X ( Orthogonal to the beam line )Standard Deviation in Velocity ( Component : X )

0

0.0005

0.001

0.0015

0.002

0.0025

0.003

0.0035

0.004

0.0045

0.0052/

10 1

4:00

-14:

30

2/10

15:

00-1

5:30

2/10

16:

00-1

6:30

2/10

17:

00-1

7:30

2/10

18:

00-1

8:30

2/10

19:

00-1

9:30

2/10

20:

00-2

0:30

2/10

21:

00-2

1:30

2/10

22:

00-2

2:30

2/10

23:

00-2

3:30

2/11

00:

00-0

0:30

2/11

01:

00-0

1:30

2/11

02:

00-0

2:30

2/11

03:

00-0

3:30

2/11

04:

00-0

4:30

2/11

05:

00-0

5:30

2/11

06:

00-0

6:30

2/11

07:

00-0

7:30

2/11

08:

00-0

8:30

2/11

09:

00-0

9:30

2/11

10:

00-1

0:30

2/11

11:

00-1

1:30

2/11

12:

00-1

2:30

2/11

13:

00-1

3:30

2/11

14:

00-1

4:30

2/11

15:

00-1

5:30

2/11

16:

00-1

6:30

2/11

17:

00-1

7:30

SD

in V

eloc

ity (k

ine,

cm

/sec

) On the tresleＰ１Ｊ（）Ｐ２Ｊ

On the concrete floorＰ３Ｊ（）Ｐ４Ｊ

MagnetPower ON

Artificial Noise in Exp. Hall ?

Earthquake

Ave. Spectra were analyized.(The earthquake data was excluded.)

(Nighttime : 19:00-03:00)

Earthquake



Daytime : 09:00-17:00

“ Standard Deviation in Velocity (1) “



Component : Y ( Parallel to the beam line )Standard Deviation in Velocity ( Component : Y )

0

0.0005

0.001

0.0015

0.002

0.0025

0.003

0.0035

0.004

0.0045

0.0052/

10 1

4:00

-14:

30

2/10

15:

00-1

5:30

2/10

16:

00-1

6:30

2/10

17:

00-1

7:30

2/10

18:

00-1

8:30

2/10

19:

00-1

9:30

2/10

20:

00-2

0:30

2/10

21:

00-2

1:30

2/10

22:

00-2

2:30

2/10

23:

00-2

3:30

2/11

00:

00-0

0:30

2/11

01:

00-0

1:30

2/11

02:

00-0

2:30

2/11

03:

00-0

3:30

2/11

04:

00-0

4:30

2/11

05:

00-0

5:30

2/11

06:

00-0

6:30

2/11

07:

00-0

7:30

2/11

08:

00-0

8:30

2/11

09:

00-0

9:30

2/11

10:

00-1

0:30

2/11

11:

00-1

1:30

2/11

12:

00-1

2:30

2/11

13:

00-1

3:30

2/11

14:

00-1

4:30

2/11

15:

00-1

5:30

2/11

16:

00-1

6:30

2/11

17:

00-1

7:30

SD

in V

eloc

ity (k

ine,

cm

/sec



MagnetPower ON


Earthquake


(Nighttime : 19:00-03:00)

Earthquake



Daytime : 09:00-17:00




Component : Z ( Vertical )Standard Deviation in Velocity ( Component : Z )

0

0.0005

0.001

0.0015

0.002

0.0025

0.003

0.0035

0.004

0.0045

0.0052/

10 1

4:00

-14:

30

2/10

15:

00-1

5:30

2/10

16:

00-1

6:30

2/10

17:

00-1

7:30

2/10

18:

00-1

8:30

2/10

19:

00-1

9:30

2/10

20:

00-2

0:30

2/10

21:

00-2

1:30

2/10

22:

00-2

2:30

2/10

23:

00-2

3:30

2/11

00:

00-0

0:30

2/11

01:

00-0

1:30

2/11

02:

00-0

2:30

2/11

03:

00-0

3:30

2/11

04:

00-0

4:30

2/11

05:

00-0

5:30

2/11

06:

00-0

6:30

2/11

07:

00-0

7:30

2/11

08:

00-0

8:30

2/11

09:

00-0

9:30

2/11

10:

00-1

0:30

2/11

11:

00-1

1:30

2/11

12:

00-1

2:30

2/11

13:

00-1

3:30

2/11

14:

00-1

4:30

2/11

15:

00-1

5:30

2/11

16:

00-1

6:30

2/11

17:

00-1

7:30

SD

in V

eloc

ity (k

ine,

cm

/sec



MagnetPower ON


Earthquake


(Nighttime : 19:00-03:00)

Earthquake



Daytime : 09:00-17:00




“ Power Spectrum Density (1) “Component : X ( Orthogonal to the beam line )

Daytime Daytime (09:00-17:00)(09:00-17:00)

Nighttime Nighttime (19:00-03:00)(19:00-03:00)




Daytime Daytime (09:00-17:00)(09:00-17:00)


“ Power Spectrum Density (2) “【 Measurement around the beam line (9) 】



Daytime Daytime (09:00-17:00)(09:00-17:00)


“ Power Spectrum Density (3) “【 Measurement around the beam line (10) 】



Daytime Daytime (09:00-17:00)(09:00-17:00)


“ Integrated Spectrum (1) “【 Measurement around the beam line (11) 】



Daytime Daytime (09:00-17:00)(09:00-17:00)




“ Coherence (1) ”

Daytime Daytime (09:00-17:00)(09:00-17:00)


Component : X ( Orthogonal )

Daytime Daytime (09:00-17:00)(09:00-17:00)




Daytime Daytime (09:00-17:00)(09:00-17:00)


Daytime Daytime (09:00-17:00)(09:00-17:00)


“ Coherence (2) ” Component : Y ( Parallel )



Daytime Daytime (09:00-17:00)(09:00-17:00)


Daytime Daytime (09:00-17:00)(09:00-17:00)


“ Coherence (3) ” Component : Z ( Vertical )



【 Earthquake record (1) 】

Tsukuba

Epicenter

Date : 21:07, Feb. 10, 2004 ( When measuring around the beam line )

Epicenter : East of ChibaDepth of hypocenter:65kmJMA Magnitude:4.2

P1J

P2J

P3J

P4J

【 X : Orthogonal 】

【 Z : Vertical 】


P1J

P2J

P3J

P4J

【 X : Orthogonal 】

【 Z : Vertical 】

Tsukuba

Epicenter

【 Earthquake record (2) 】Date : 14:04, Feb. 11, 2004 ( When measuring around the beam line )

Epicenter : South of IbarakiDepth of hypocenter:70kmJMA Magnitude:3.7


“ Minimum and Maximum in velocity, Amplification ratio “

component : X Component : Y Component : ZMin.(kine) Max.(kine) Min.(kine) Max.(kine) Min.(kine) Max.(kine)

Ｐ１Ｊ(P1J/P3J)

-0.02088(1.12)

0.02025(1.50)

-0.01663(1.22)

0.02494(1.34)

-0.00855(1.07)

0.00829(1.10)

Ｐ２Ｊ(P2J/P3J)

-0.01901(1.02)

0.01376(1.02)

-0.01389(1.02)

0.01908(1.02)

-0.00737(0.92)

0.00756(1.00)

Ｐ３Ｊ -0.01862 0.01349 -0.01359 0.01855 -0.00799 0.00753

Ｐ４Ｊ(P4J/P3J)

-0.01979(1.06)

0.01398(1.04)

-0.01367(1.00)

0.01904(1.03)

-0.00803(1.00)

0.00694(0.92)

component : X Component : Y Component : ZMin.(kine) Max.(kine) Min.(kine) Max.(kine) Min.(kine) Max.(kine)

Ｐ１Ｊ(P1J/P3J)

-0.04841(1.47)

0.05130(1.92)

-0.04665(1.25)

0.04180(1.36)

-0.01851(1.44)

0.01641(1.42)

Ｐ２Ｊ(P2J/P3J)

-0.03389(1.03)

0.02800(1.05)

-0.03878(1.04)

0.03178(1.04)

-0.01449(1.13)

0.01353(1.17)

Ｐ３Ｊ -0.03293 0.02673 -0.03724 0.03066 -0.01285 0.01154

Ｐ４Ｊ(P4J/P3J)

-0.03259(0.99)

0.02820(1.05)

-0.03855(1.04)

0.03084(1.01)

-0.01063(0.83)

0.01156(1.00)

〔 Earthquake 1 : 21:07, 2004.2.10 , Epicenter : East of Chiba 〕

〔 Earthquake 2 : 14:04, 2004.2.11 , Epicenter : South of Ibaraki 〕

【 Earthquake record (3) 】


【 Comparison (1) 】1) “ATF at KEK” Feb. 10, 2004 – Feb. 11, 20042) “D03 P.S.Bldg. at KEK” Dec. 27, 2002 – Dec. 28, 20023) “SPring-8” June 14, 2003 – June 15, 2003

SPring-8SPring-8ATFATF

D3 P.S.Bldg.D3 P.S.Bldg.


【 Comparison(2) 】Component : X



“ Power Spectrum Density and Integrated Spectrum “


【 Comparison(3) 】Component : Y





【 Comparison(4) 】Component : Z





【 Summary 】

- ATF at KEK -

•The peak around 0.2Hz and 3Hz is observed in allmeasurement points.•Horizontal natural frequency of the trestle in ATFis thought to be around 10 - 12 Hz.•As the peak excited only P1J can’t be observed,vertical natural frequency of the trestle in ATF isnot clear.•In the P1J (the measurement point on the trestle), the vibration is amplified during the earthquake.


【 Summary 】

•The level of ground motion in the KEK is muchhigher than that in the SPring-8.•The amplitude of the peak around 2-3Hz is almost the same between the ATF and the D3 power supplybuilding at the KEK. •There is a difference in the peak around 0.2Hz,because the observed season is different.

- Comparison (KEK, SPring-8) -

Ground Motion Measurement in Accelerator Test Facility at KEK

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