دورية أكاديمية
Control of Proton Beam Self-Modulation for AWAKE via Initial Beam Parameters
| العنوان: | Control of Proton Beam Self-Modulation for AWAKE via Initial Beam Parameters |
|---|---|
| المؤلفون: | Wyler, Samuel |
| المصدر: | http://infoscience.epfl.ch/record/295838Test. |
| سنة النشر: | 2022 |
| المجموعة: | Ecole Polytechnique Fédérale Lausanne (EPFL): Infoscience |
| الوصف: | Plasma wakefield acceleration is a promising concept in the development of a new type of electron accelerators for high-energy physics experiments. The Advanced Wakefield Experiment AWAKE is based on this concept and has been, following the first successful proof of concept Run, under continuous and carefully planned development. In the future Run 2c, the experimental setup will consist of two plasma sources in which the highly relativistic proton driver bunch will undergo seeded self-modulation in the first plasma source, and electron acceleration will be performed in the second. Self-modulation is governed by transverse wakefields which have their origin in the self-modulation instability (SMI). At AWAKE, SMI can be controlled by either laser or electron seeding, which provides a wakefield peak that defines the phase of the fields and that of the emerging micro-bunch train. Consecutive bunches appear in the periodicity given by the plasma frequency such that they coherently drive the longitudinal wakefields. When laser seeding is applied, the part of the bunch in front of the seeding does not travel through plasma. For a successful application of laser seeding, this unmodulated front must not undergo self-modulation in the second plasma source. This front part will have a transverse bunch size of about 500 μm when arriving at the second plasma source. I studied in this thesis the self-modulation of proton beams of different transverse sizes. In the experiment the transverse proton beam sizes at the plasma entrance are measured by a code I developed which provides a description of the proton beam envelope. This characterisation of the proton beam is used to determine the parameter space of the numeric simulations. A detailed explanation of the code and propositions for noise reduction are given in this work. In this thesis for the first time the self-modulation growth rate of beams with trans- verse sizes larger than in the baseline design will be compared. It will be demonstrated through experiment that a ... |
| نوع الوثيقة: | text |
| اللغة: | unknown |
| العلاقة: | http://infoscience.epfl.ch/record/295838Test; https://infoscience.epfl.ch/record/295838/files/samuel_wyler_master_thesis.pdfTest |
| الإتاحة: | http://infoscience.epfl.ch/record/295838Test https://infoscience.epfl.ch/record/295838/files/samuel_wyler_master_thesis.pdfTest |
| رقم الانضمام: | edsbas.BBC95C41 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |