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DRAFT<br />

For magnets with less stringent field quality requirements (e.g. correctors and steerer magnets<br />

whose field has only to be known in the range of a percent) it is sufficient to monitor the production<br />

randomly by measuring only one or few magnets (see also section 2.4.A5.1). The different measurement<br />

methods foreseen for the different magnets are summarized in Table 2.4.41. The curvature<br />

of the used search coils for the dipoles is given in Table 2.4.42 and the radius of the rotating coil is<br />

given in Table 2.4.43.<br />

Matching Magnet Length<br />

For machines with only a few dipoles and quadrupoles (e.g. 24 pieces) the length of the magnets<br />

has to be matched. For this purpose laminations are inserted at the end of the yoke. The field of the<br />

magnet has to be remeasured after this operation.<br />

Table 2.4.41: Magnetic measurement method to apply for the different magnets.<br />

a) dipoles<br />

field strength field direction field homogeneity centre<br />

CR<br />

NESR<br />

RESR<br />

<strong>Super</strong>-FRS<br />

search coil pole shoes search coil pole shoes<br />

b) quadrupoles / correctors<br />

SIS 300<br />

HESR<br />

SIS 100<br />

CR<br />

NESR<br />

RESR<br />

<strong>Super</strong>-FRS<br />

field strength axis field direction field homogeneity<br />

rotating coil pole shoes rotating coil<br />

rotating coil pole shoes rotating coil<br />

Table 2.4.42: Search coil curvature applied for measuring the main dipoles of the different facilities.<br />

Facility Curvature of the search coil [m]<br />

<strong>Super</strong> FRS 12.5, 4.35<br />

CR 8.125<br />

NESR / RESR 8.125<br />

HEBT 62.5, 4.35<br />

Table 2.4.43: Radius of the rotating coil for the different machines for measuring quadrupoles and higher<br />

order correctors (to be adjustment after the magnet designs are fixed).<br />

Facility Radius of the rotating coil [mm]<br />

<strong>Super</strong> FRS 180 (multiplet system)<br />

CR 70, 156<br />

NESR / RESR 90, 128<br />

HEBT 52,5, 65, 156<br />

193

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