Beam losses along the ESS LINAC due to nonlinear eﬀects  A Statistical review
(2016) FMS820 20162Mathematical Statistics
 Abstract
 In this project, a comprehensive statistical review is done regarding beam distribution evolution and losses of protons in the ESS LINAC. It aims to clarify some unanswered questions regarding the change in the distribution as it evolves through the LINAC and how sudden changes can eﬀect the losses of protons downstream. The correlation between the sub phasespaces were removed to be able to study the nonlinear forces acting on the distribution. Several statistical tools were used to analyse these distributions and visualize them in a comprehensive manner. Furthermore, this report aims to give an overview of the maximum losses that one may expect in the current lattice conﬁguration in the ESS LINAC. An EVT (Extreme Value Theory) approach... (More)
 In this project, a comprehensive statistical review is done regarding beam distribution evolution and losses of protons in the ESS LINAC. It aims to clarify some unanswered questions regarding the change in the distribution as it evolves through the LINAC and how sudden changes can eﬀect the losses of protons downstream. The correlation between the sub phasespaces were removed to be able to study the nonlinear forces acting on the distribution. Several statistical tools were used to analyse these distributions and visualize them in a comprehensive manner. Furthermore, this report aims to give an overview of the maximum losses that one may expect in the current lattice conﬁguration in the ESS LINAC. An EVT (Extreme Value Theory) approach was used to model these extreme losses to highlight extreme scenarios in the LINAC. Many interesting features arise regarding the distribution evolution which can be conﬁrmed in theory and the maximum losses could be regarded as within the limit set by the ESS design report. The results illustrates that changes in the distribution can be found with the KStest and can act complementary to the tools used by the physicists today, with a little reﬁnements. Furthermore, the GMM may indicate that the distributions are multimodal, thus opening the questions around the interpretation of the moments of the distributions and their relation to the tools used for analysis. The EVT approach showed that no concern is needed regarding the exceedances of the proposed highest limit of losses, 1 W/m. In conclusion, the report highlights statistical tools for beam monitoring and further research in this subject may be of scientiﬁc interest. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/studentpapers/record/8899764
 author
 Lauge Pedersen, Alexander
 supervisor

 Dragi Anevski ^{LU}
 organization
 course
 FMS820 20162
 year
 2016
 type
 H2  Master's Degree (Two Years)
 subject
 keywords
 ESS, Beam Physics, linac, Linear Accelerator, High intensity lincas, particle distributions, statistics, KolmogorovSmirnov tests, mathematics, Monte Carlo, EVT, GEV, TraceWin, Particle Simulation
 language
 English
 id
 8899764
 date added to LUP
 20170117 11:29:39
 date last changed
 20170117 15:20:14
@misc{8899764, abstract = {In this project, a comprehensive statistical review is done regarding beam distribution evolution and losses of protons in the ESS LINAC. It aims to clarify some unanswered questions regarding the change in the distribution as it evolves through the LINAC and how sudden changes can eﬀect the losses of protons downstream. The correlation between the sub phasespaces were removed to be able to study the nonlinear forces acting on the distribution. Several statistical tools were used to analyse these distributions and visualize them in a comprehensive manner. Furthermore, this report aims to give an overview of the maximum losses that one may expect in the current lattice conﬁguration in the ESS LINAC. An EVT (Extreme Value Theory) approach was used to model these extreme losses to highlight extreme scenarios in the LINAC. Many interesting features arise regarding the distribution evolution which can be conﬁrmed in theory and the maximum losses could be regarded as within the limit set by the ESS design report. The results illustrates that changes in the distribution can be found with the KStest and can act complementary to the tools used by the physicists today, with a little reﬁnements. Furthermore, the GMM may indicate that the distributions are multimodal, thus opening the questions around the interpretation of the moments of the distributions and their relation to the tools used for analysis. The EVT approach showed that no concern is needed regarding the exceedances of the proposed highest limit of losses, 1 W/m. In conclusion, the report highlights statistical tools for beam monitoring and further research in this subject may be of scientiﬁc interest.}, author = {Lauge Pedersen, Alexander}, keyword = {ESS,Beam Physics,linac,Linear Accelerator,High intensity lincas,particle distributions,statistics,KolmogorovSmirnov tests,mathematics,Monte Carlo,EVT,GEV,TraceWin,Particle Simulation}, language = {eng}, note = {Student Paper}, title = {Beam losses along the ESS LINAC due to nonlinear eﬀects  A Statistical review}, year = {2016}, }