JACoW logo

Joint Accelerator Conferences Website

The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.

RIS citation export for THPOR004: Magnetic Measurement for Superconducting-Quadrupole-Magnets of Final-Focus System for SuperKEKB

AU - Arimoto, Y.
AU - Iwasaki, M.
AU - Ohuchi, N.
AU - Tsuchiya, K.
AU - Wang, X.
AU - Yamaoka, H.
AU - Zong, Z.G.
ED - Petit-Jean-Genaz, Christine
ED - Kim, Dong Eon
ED - Kim, Kyung Sook
ED - Ko, In Soo
ED - Schaa, Volker RW
TI - Magnetic Measurement for Superconducting-Quadrupole-Magnets of Final-Focus System for SuperKEKB
J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016
C1 - Busan, Korea
T2 - International Particle Accelerator Conference
T3 - 7
LA - english
AB - SuperKEKB is an upgrade project of KEKB to increase its luminosity to 8 x 10³⁵ cm⁻² s⁻¹ based on the nano-beam scheme. In SuperKEKB, one of a key element is a final-focus system; it reduces e⁻/e⁺ beam size to 50 nm in vertical and 10 μm in horizontal direction at an interaction point (IP). The system consists of eight superconducting quadrupole magnets and four quadrupoles are aligned on the each beam line. The quadrupole, QC1P(QC1E), which is located at the closest position to the IP on the e⁺(e⁻) beam line, generates a field gradient of about 70 T/m. An inner diameter of coil and a magnetic length for QC1P(QC1E) are 25(33) mm and 334(373) mm, respectively. The production of all quadrupole magnets are completed. To confirm their field qualities, we performed magnetic measurement for each magnet in advance to be integrated into cryostats on the beam lines. In the measurement, the quadrupoles were cooled down to 4.2 K in a test vertical cryostat and field harmonic components were measured with harmonic coils. The magnitude of error multipole components for all magnets met requirements from beam optics design. In this paper we describe the measurement results.
CP - Geneva, Switzerland
SP - 3771
EP - 3773
KW - quadrupole
KW - sextupole
KW - luminosity
KW - octupole
KW - radiation
DA - 2016/06
PY - 2016
SN - 978-3-95450-147-2
DO - 10.18429/JACoW-IPAC2016-THPOR004
UR - http://jacow.org/ipac2016/papers/thpor004.pdf
ER -