IPAC2012 - List of Authors (Chen, C.)

Paper	Title	Page
WEPPR032	Simulation Studies of Adiabatic Thermal Beams in a Periodic Solenoidal Focusing Field	3003
	C. Chen, T.J. Barton, D.M. Field, K.M. Lang MIT, Cambridge, Massachusetts, USA
	Funding: Research supported by DOE Grant No. DE-FG02-95ER40919, Grant No. DE-FG02-05ER54836, and MIT Undergraduate Research Opportunity Program. Self-consistent simulations are performed to verify the theoretical predictions of adiabatic thermal beams in periodic solenoidal magnetic focusing fields,. In particular, results are obtained for adiabatic thermal beams that do not rotate in the Larmor frame. For such beams, the theoretical predictions of the rms beam envelope, the conservation of the rms thermal emittance, the adiabatic equation of state, and the Debye length are verified in the self-consistent simulations. K.R. Samokhvalova, J. Zhou and C. Chen, Phys. Plasma 14, 103102 (2007). **J. Zhou, K.R. Samokhvalova and C. Chen, Phys. Plasma 15, 023102 (2008).

THPPD019	Accurately Determining the Parameters of a Magnet Coil by 3D CAD Design	3539
	N. Li LBNL, Berkeley, California, USA C. Chen, H.J. Hu, J. Jin, W.Y. Wen, L. Yin SINAP, Shanghai, People's Republic of China
	Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC02-05CH11231. Traditionally, the average turn length and number of turns of a conventional magnet coil is roughly estimated during the magnet physical design. Based on these estimates, the resistance, water flow and overall dimensions of the coil are calculated. But for a complex coil shape, it is very difficult to determine how many turns a coil will have and, more importantly, specifically how it will be wound. In many cases, an engineer will use a scale model to do a winding trial, but the coil parameters, such as the conductor length and overall coil dimensions, still cannot be precisely determined. 3D CAD modeling was used for the design of the Advanced Light Source (ALS) combined function sextupole magnet coils. The winding procedures for 11 types of coils were all determined by the models. The resistances and water flow requirements of those coils were calculated from the 3D models, and those parameters were used as criteria for production quality control thereafter. This paper will introduce some basic modeling techniques that are useful for 3D CAD modeling of magnet coils. The coil data comparison between 3D model and true built coils will be introduced as well.

Paper

Title

Page

Simulation Studies of Adiabatic Thermal Beams in a Periodic Solenoidal Focusing Field

3003

C. Chen, T.J. Barton, D.M. Field, K.M. Lang
MIT, Cambridge, Massachusetts, USA

Funding: Research supported by DOE Grant No. DE-FG02-95ER40919, Grant No. DE-FG02-05ER54836, and MIT Undergraduate Research Opportunity Program.
Self-consistent simulations are performed to verify the theoretical predictions of adiabatic thermal beams in periodic solenoidal magnetic focusing fields*,**. In particular, results are obtained for adiabatic thermal beams that do not rotate in the Larmor frame. For such beams, the theoretical predictions of the rms beam envelope, the conservation of the rms thermal emittance, the adiabatic equation of state, and the Debye length are verified in the self-consistent simulations.
*K.R. Samokhvalova, J. Zhou and C. Chen, Phys. Plasma 14, 103102 (2007).
**J. Zhou, K.R. Samokhvalova and C. Chen, Phys. Plasma 15, 023102 (2008).

THPPD019

Accurately Determining the Parameters of a Magnet Coil by 3D CAD Design

3539

N. Li
LBNL, Berkeley, California, USA
C. Chen, H.J. Hu, J. Jin, W.Y. Wen, L. Yin
SINAP, Shanghai, People's Republic of China

Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC02-05CH11231.
Traditionally, the average turn length and number of turns of a conventional magnet coil is roughly estimated during the magnet physical design. Based on these estimates, the resistance, water flow and overall dimensions of the coil are calculated. But for a complex coil shape, it is very difficult to determine how many turns a coil will have and, more importantly, specifically how it will be wound. In many cases, an engineer will use a scale model to do a winding trial, but the coil parameters, such as the conductor length and overall coil dimensions, still cannot be precisely determined. 3D CAD modeling was used for the design of the Advanced Light Source (ALS) combined function sextupole magnet coils. The winding procedures for 11 types of coils were all determined by the models. The resistances and water flow requirements of those coils were calculated from the 3D models, and those parameters were used as criteria for production quality control thereafter. This paper will introduce some basic modeling techniques that are useful for 3D CAD modeling of magnet coils. The coil data comparison between 3D model and true built coils will be introduced as well.