HB2014 - List of Authors (Schmidt, F.)

Paper

Title

Page

Code Requirements for Long Term Tracking with Space Charge

249

F. Schmidt
CERN, Geneva, Switzerland

In view of the LHC Injectors Upgrade (LIU) for the LHC pre-accelerators Leir, PSB, PS, SPS we have started a new working group at CERN to deal with space charge issues of these machines. The goal is to operate these machines with basically twice the number of particles per bunch which will further increase the space charge tune shifts which are large already now in present operation. Besides the obvious remedies of increasing the injection energy we are obliged to better understand the space charge force to optimize our machines. To this end it has become clear that we need computer models that faithfully represent the linear but also the non-linear features of our machines. We have started close collaborations with several laboratories around the world to upgrade existing self-consistent Space Charge Particle-In-Cell (PIC) codes for our CERN needs. In parallel, we have created a frozen space charge facility in CERN's MAD-X code. Both types of codes are being used to study long-term stability of our machines and to compare it with machine experiments.

Slides WEO2LR01 [3.171 MB]

THO1LR03

Recent Development in the Mitigation of Long Term High Intensity Beam Loss

330

G. Franchetti, S. Aumon, F. Kesting, H. Liebermann, C. Omet, D. Ondreka, R. Singh
GSI, Darmstadt, Germany
S.S. Gilardoni, A. Huschauer, F. Schmidt, R. Wasef
CERN, Geneva, Switzerland

In this talk it is presented the state of the art studies to mitigate the long term beam loss in the FAIR accelerator. The effect of high intensity is discussed in relation with high intensities. In particular the discussion is made on the interplay of space charge with coupled machine resonance as the 3rd order. A new development in the theory of the 3rd order resonance is used to discuss the periodic crossing of resonances, hence the mitigation of the resonance effects, and experimental investigation (CERN-PS, and GSI) are addressed and interpreted.

Paper	Title	Page
WEO2LR01	Code Requirements for Long Term Tracking with Space Charge	249
	F. Schmidt CERN, Geneva, Switzerland
	In view of the LHC Injectors Upgrade (LIU) for the LHC pre-accelerators Leir, PSB, PS, SPS we have started a new working group at CERN to deal with space charge issues of these machines. The goal is to operate these machines with basically twice the number of particles per bunch which will further increase the space charge tune shifts which are large already now in present operation. Besides the obvious remedies of increasing the injection energy we are obliged to better understand the space charge force to optimize our machines. To this end it has become clear that we need computer models that faithfully represent the linear but also the non-linear features of our machines. We have started close collaborations with several laboratories around the world to upgrade existing self-consistent Space Charge Particle-In-Cell (PIC) codes for our CERN needs. In parallel, we have created a frozen space charge facility in CERN's MAD-X code. Both types of codes are being used to study long-term stability of our machines and to compare it with machine experiments.
	Slides WEO2LR01 [3.171 MB]

THO1LR03	Recent Development in the Mitigation of Long Term High Intensity Beam Loss	330
	G. Franchetti, S. Aumon, F. Kesting, H. Liebermann, C. Omet, D. Ondreka, R. Singh GSI, Darmstadt, Germany S.S. Gilardoni, A. Huschauer, F. Schmidt, R. Wasef CERN, Geneva, Switzerland
	In this talk it is presented the state of the art studies to mitigate the long term beam loss in the FAIR accelerator. The effect of high intensity is discussed in relation with high intensities. In particular the discussion is made on the interplay of space charge with coupled machine resonance as the 3rd order. A new development in the theory of the 3rd order resonance is used to discuss the periodic crossing of resonances, hence the mitigation of the resonance effects, and experimental investigation (CERN-PS, and GSI) are addressed and interpreted.