Slow Extraction Workshop 2017

Session

Session 2: Existing and new loss reduction methods

9 Nov 2017, 14:00

6/2-024 - BE Auditorium Meyrin (CERN)

Conveners

Session 2: Existing and new loss reduction methods

• Matthew Alexander Fraser (CERN)
• Kevin Brown (Brookhaven National Laboratory)

33. Simulating slow-extraction 15+5'

Dr Francois Meot (Brookhaven National Laboratory)

09/11/2017, 14:00

34. Dynamic bump and Hardt condition 15+5'

Linda Susanne Stoel (Vienna University of Technology (AT))

09/11/2017, 14:20

35. Separatrix folding with multipoles 15+5'

Kevin Brown (Brookhaven National Laboratory)

09/11/2017, 14:40

36. Massless septum for loss reduction 15+5'

Mr Kristof Brunner

09/11/2017, 15:00

37. Passive diffuser studies and design 15+5'

Brennan Goddard (CERN)

09/11/2017, 15:20

A passive scattering device (diffuser) can be used to reduce septum beamloss. The talk describes the underlying physics processes, and investigates the dependence on the diffuser geometry, material and location. Numerical simulations to quantify the expected performance gain for the optimum configuration are presented, and the progress with the realisation of a prototype for deployment in the...

39. Crystals for loss reduction at IHEP & CERN 15+5'

Walter Scandale

09/11/2017, 16:10

38. Crystal shadowing studies for septa 15+5'

Francesco Maria Velotti (CERN)

09/11/2017, 16:30

40. Loss collimation 15+5'

Ryotaro Muto

09/11/2017, 16:50

41. Slow extraction efficiency measurement 15+5'

Matthew Alexander Fraser (CERN)

09/11/2017, 17:10

The high efficiency of most slow extraction systems make quantifying the exact amount of beam lost in the process extremely challenging. This is compounded by the lack of time structure in the extracted beam, as is typically requested by high energy physics users, and the difficulty in accurately calibrating d.c. intensity monitors at count rates of ~ 1E13 Hz. Common techniques used to...

42. Translation vs. diffusion -driven 3rd integer extraction 15+5'

Sergey Ivanov (Institute for High Energy Physics (IHEP))

09/11/2017, 17:30

The talk discusses pro et contra for implementing either translational of diffusive fluxes to feed the 3rd order resonance for a slow extraction. The outcomes are applicable to both momentum or amplitude techniques of forcing beam edge to the extraction mechanism, and are supported by observations and experience gained at the U70 proton synchrotron.