THE MAIN TEST RESULTS OF THE 3.5 TESLA 49-POLE SUPERCONDUCTING WIGGLER FOR DLS

3.5 Tesla 49-pole superconducting wiggler with 16 mm magnetic gap and 60 mm period for Diamond Light Source (England) has been fabricated in Budker INP. A first wiggler test was carried out in bath cryostat in BINP on July 2005. The first wiggler test in own cryostat was performed in BINP on January 2006. This test includes field integrals measurements with stretched wire method and field measurements with hall probe. All this measurements were repeated on April 2006 in DLS. Design of special magnetic measurement system with anti-chamber and main wiggler tests results are presented in this paper. WIGGLER TEST IN BATH CRYOSTAT After fabrication and assembling of the wiggler's magnetic system it was tested in the bath cryostat. The first goal of this test was to achieve requested magnetic field value. Total number of the quenches made during training is 24 (see Fig.1). First quench occurred with power supplies currents Is=254 A Ic=254A and corresponded to average magnetic field of 3.022 Tesla. All quenches occurred inside different coils with trend of increasing of the field. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Quench number 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8