Abstract

Quadruple Magnets Tuning

Tsyganov Aleksandr, Budker Institute of Nuclear Physics, Russia

 The tuning of quadruples within the production cycle of BINP is described. The procedure of preliminary

adjustment harmonics with bronze inserts between the poles and fine tune with a nose pieces on the poles is shown. The relationship the geometric parameters of these elements with the quality of the magnetic field are presented. The main conclusion - except an understanding of what determines the quality of the magnetic field of quadruples the need for quick and precise measurement for the successful tuning and production magnets.

 

BUDKER INSTITUTE OF NUCLEAR PHYSICSNOVOSIBIRSK, RUSSIA

A.Tsyganov

Quadruple Magnets TuningQuadruple Magnets Tuning

• First measure

• Insert cooper-chromium bars

• Selection length of nose pieces

• Gluing nose pieces

• Check again

• Reassembly

• Inspection removing and setting back nose pieces

• Statistic tuned quadruple

• Conclusions

It is first measure a magnetic

property of magnets inside

technological cycle of produce

quadruples. Measure provide

without water cooling and with

temporary electrical connections.

The height of the magnet spacers

must be greater than the rated on

the

0.1-0.15mm

On the results of this step, we can

plan ways tune this magnet.

Insertion cooper-

chromium (bronze)

bars changed a3 and

b4.

It step is necessary to

obtain a3 and b4

within one unit.

In addition insertions

is need to achieve

good reassembly.

A3 and B4 changed by size of insertion.

The insertion can be selected with step 5-10 microns.

9807-0016

9807-0016

If the A3 has a slope in the measured range of currents we can tuned this slope by changing the length of the nose pieces.

9807-0026

After the final adjustment of nose pieces made pinning them. Pinning is a mechanical operation with a some effort on the nose pieces and pole. Therefore need to glue nose pieces.This operation can last up to an hour, the time to start curing epoxy glue.Performed on the magnet without water with a temporary electricalswitching on a coils and at low current (40A)

The adjustment is made by shifts and turns. An example of settings a magnet pads 9804-0029

Step

1 2 3 4 5 6 7 8 9 10 11

a3 0.92 0,14 0,19 0,38 -0,12

-0,91

-0,8 -0,69

-0,42

-0,37

-0,15

b3 0,83 -0,29

0,3 -0,14

0,18 1,28 1,1 0,84 0,22 -0,2 -0,03

b4 1,24 0,36 0,58 0,09 1,2 0,82 0,69 0,5 0,09 -0,21

-0,35

a5 -0,47

-0,27

-0,23

-0,21

0,17 0,09 0,07 0,34 0,01 0,03 0,01

b5 -0,01

-0,19

-0,05

0,09 0,32 0,17 0,12 0,06 -0,02

-0,01

-0,06

All magnets pass through reassembly test

9804-0029

9804-0029

9804-0022

9804-0022

Result first measure harmonics

Result measure tuned quadruple

• A quality magnetic field of the quadruple is determined not only the correctness of the geometry, but no less quality materials..

• Fast and precise magnetic measure stand

• Good team