Cutting-edge Nuclear Physics Experiments and Kinematics Insights
Explore the latest developments in nuclear physics experiments, featuring advanced equipment like Asweep magnet and detailed kinematics analysis of experiments such as SI pion, DVCS, and WACS. Discover solutions to field problems and innovative solutions using images and descriptions from the NPS bi-weekly meetings.
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Asweep magnet for the NPS experiments Bogdan Wojtsekhowski (JLab)
Kinematics of SI pion (E12-13-007) 10.57 16.20 12.44 7.93 16.57 17.23 e 10.27 11.70 15.38 24.15 15.65 17.84 # Dcalo,m 1.57 1.57 1.57 1.57 1.57 1.57 Bdl, Tm 0.3 0.3 0.3 0.3 0.3 0.3 D.m-c, m angle range 3-1.57 A B C D E F 1.43 1.43 1.43 4.7-11.1 deg. 2 NPS Bi-weekly Meeting January 2015
Kinematics of DVCS (E12-13-10) 16.2 12.4 21.7 16.6 6.3 6.3 e 11.7 15.3 11.7 15.6 27.9 17.3 # Dcalo ,m 3 3 3 3 6 6 Bdl, Tm 0.3 0.3 0.3 0.3 0.3 0.3 D.m-c, m angle range 1.43 1.43 1.43 1.43 4.43 4.43 3 5 7 8 13 16 3.1 - 9.6 deg range of angles: 68 cm / 300 => 12.8 degrees range of angles: 68 cm / 600 => 6.5 degrees 3 NPS Bi-weekly Meeting January 2015
Kinematics of WACS (E12-14-003) /Pion 14.2 17.9 22.5 26.9 34.0 11.0 13.8 16.9 19.7 29.9 p Dmag ,m Bdl, Tm Ddet, m 40.1 2.45+0.2 33.7 1.65+0.2 27.8 1.65+0.2 23.7 1.10+0.2 18.9 1.10+0.2 41.7 2.45+0.2 35.3 2.45+0.2 30.0 1.65+0.2 26.3 1.65+0.2 17.8 1.10+0.2 # D.m-c, m 6.15 Bdl / D.m-c 0.3 / (9-1.57) 4A 4B 4C 4D 4E 5A 5B 5C 5D 5E 0.3 0.4 0.5 0.6 0.6 0.25 0.35 0.4 0.5 0.6 9.0 7.0 5.0 3.5 3.0 11.0 9.0 7.5 6.0 3.25 1.7 0.61 Tm / 1.68 m 9.3-12.7 deg 1.95 0.70 Tm / 1.68 m 4 NPS Bi-weekly Meeting January 2015
Horizontal field dipole the beam side is free of coils the beam opening is +/- 1 degree open aperture to detector above 2 degrees! 5 NPS Bi-weekly Meeting January 2015
Horizontal field dipole 30 cm 2 deg. 157 cm 6 NPS Bi-weekly Meeting January 2015
Fringe field problem 30 cm 157 cm 7 NPS Bi-weekly Meeting January 2015
Fringe field solution 30 cm 157 cm 8 NPS Bi-weekly Meeting January 2015
HMS side solution 30 cm 30 cm 157 cm 157 cm 4 deg. on HMS side 9 NPS Bi-weekly Meeting January 2015
Q1 cut 30 cm 30 cm cut for Q1? 157 cm 157 cm 4 deg. on HMS side 10 NPS Bi-weekly Meeting January 2015
Fringe field result SIPP/DVCS angle & field 30 cm ---- Bx =150 G 157 cm Bdl ~ 150 Gcm => 0.4 mrad for 6.6 GeV 11 NPS Bi-weekly Meeting January 2015
Fringe field problem SIPP/DVCS angle & field 12 NPS Bi-weekly Meeting January 2015
Horizontal field dipole, model SAM-DVCS Iron weight is of 15 tons Coils weight is of 1.5 tons 13 NPS Bi-weekly Meeting January 2015
Horizontal field dipole, model SAM-WACS Iron weight is of 20 tons Coils weight is of 1.5 tons NPS Bi-weekly Meeting January 2015 14
Summary The sweep/deflector magnet for the four NPS experiments could be made by using a horizontal field magnet. The total weight of the magnet is of 22 tons The coils using low current density 400 (700) A/cm2 , which will require of 110 kW (150 V) power. The distance from the pivot to magnet center is fixed of 157 cm. 15 NPS Bi-weekly Meeting January 2015
