field quality working group - stephane sanfilippo at-mtm field quality of mq: warm/cold correlation....

Field Quality Working Group - Stephane Sanfilippo AT-MTM

Field Quality of MQ:

Warm/cold correlation.

S.Sanfilippo, M.Calvi, N.Sammut, L.Bottura, P.Hagen, E.Todesco

AT-MTM/AT-MAS


Measurements at 1.9 K (august 2005). 150 arc SSS tested at cold. Field strength : data from 29 MQ’s available

8 first MQ measured with the scanner (rotating coils). 21 MQ measured with the SSW system. SSW system is the reference system at 11850 A.

Field Quality (multipoles) :21 MQ’s cold tested in the SSS. 8 first MQ’s measured with the scanner, 13 MQ with long

shafts. 15 with X-section 1, 6 with X-section 2

6 MQ’s measured since the impact of the high on the W/C correlation was found out (November 2004):

MQ 114, MQ 120, MQ142, MQ145, MQ151,MQ173.


Warm/cold correlation status for Gdl/i

Data for the scanner shifted by 17 units (offset between the two systems)

(established at nominal current)

58.1

58.2

58.3

58.4

58.5

58 58.1 58.2 58.3 58.4

warm TF (T / kA)

cold

TF

(T

/ kA

)

TF_scannerTF_SSWTF - out of W/C

Series5

17 units

w/c~20 units

w/c~4 units

6 apertures outside the correlation:MQ 120 (x2), MQ 145 (x2),

MQ114 (ap 1),MQ 142 (ap 2).

Criteria (Difference with T.C >>3w/c)

value-fit (unit) ap1 ap2

MQ120 -50 -40

MQ145 -21 -33

MQ114 -28 OK

MQ142 OK -27

T.C


Warm/cold correlation status for b6(established at nominal current)

6 apertures outside the correlation:

MQ 120 (x2), MQ 145(x2), MQ114 (ap 1),MQ 142 (ap 2),

Criteria (Difference with T.C>>3w/c)

0

2

4

6

8

0 2 4 6 8warm b6- units @ 17 mm

cold

b6 (

unit

s @

17 m

m)

b6

b6 - out of W/C

w/c~ - 0.3 units

w/c~0.26 units


MQ120 2.74 1.97

MQ145 1.39 2.28

MQ114 1.56 OK

MQ142 OK 2.74

T.C


Warm/cold correlation status for b6(established at injection current)


MQ 120 (x2), MQ 145 (x2), MQ114 (ap 1),MQ 142 (x1) MQ 173 (ap1)

Criteria (Difference with T.C>>3w/c)

-5

-3

-1

1

3

5

0 2 4 6 8 10warm b6- units @ 17 mm

cold

b6 (

unit

s @

17 m

m)

b6

b6 - out of W/C

w/c~ - 3.70 units

w/c~0.4 units


MQ120 2.16 2.20

MQ145 1.34 2.06

MQ114 1.26 OK

MQ142 OK 1.60

MQ173 1.13 OK

T.C


Warm/cold correlation status for b10(established at nominal current)


MQ 120(x2), MQ 145(x2), MQ114 (ap 1),MQ 142 (ap2)

Criteria (Difference with T.C >>3w/c)

-0.4

-0.35

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

-0.4 -0.3 -0.2 -0.1 0 0.1 0.2warm b10- units @ 17 mm

cold

b10 (

unit

s @

17 m

m)

b10 outsideb10

w/c~ - 0.03 units

w/c~0.03 units


MQ120 -0.23 -0.16

MQ145 -0.1 -0.19

MQ114 -0.14 OK

MQ142 OK -0.22

T.C


Conclusions 6/58 apertures out of the warm/cold correlation for

TF,b6,b10. Analysis performed with 3 systems of measurements at

1.9 K. Magnets feature b6 close or below 2 units at warm.

Measurements to be performed with magnets where the is known and out of tolerance. reminder :20 SSS to be measured till the end of

2006.

field quality working group - stephane sanfilippo at-mtm field quality of mq: warm/cold correlation....

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