IPAC2022 - List of Authors (Zevi Della Porta, G.)

Paper	Title	Page
MOOYGD2	The AWAKE Experiment in 2021: Performance and Preliminary Results on Electron-Seeding of Self-Modulation	21
	E. Gschwendtner, L. Verra, G. Zevi Della Porta CERN, Meyrin, Switzerland P. Muggli, L. Verra MPI, Muenchen, Germany P. Muggli MPI-P, München, Germany L. Verra TUM, Munich, Germany
	The future programme of the Advanced Wakefield (AWAKE) experiment at CERN relies on the seeded self-modulation of an entire proton bunch, resulting in phase-reproducible micro-bunches. This important milestone was achieved during the 2021 proton run by injecting a short electron bunch ahead of the proton bunch, demonstrating for the first time the electron-seeding of proton bunch self-modulation. This talk describes the programme, performance and preliminary results of the AWAKE experiment in the 2021 proton run, and introduces the program of the 2022 proton run. The observation of electron-seeded self-modulation opens new avenues of exploration which will be studied in 2022, including the effect of a phase difference between the front and the back of a proton bunch and the possibility of reproducibly seeding the hosing instability using the electron beam.
	Slides MOOYGD2 [7.040 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-MOOYGD2
About •	Received ※ 07 June 2022 — Revised ※ 16 June 2022 — Accepted ※ 16 June 2022 — Issue date ※ 16 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPOPT042	Recent AWAKE Diagnostics Development and Operational Results	343
	E. Senes, S. Burger, M. Krupa, T. Lefèvre, S. Mazzoni, E. Poimenidou, A. Topaloudis, M. Wendt, G. Zevi Della Porta CERN, Meyrin, Switzerland P. Burrows, C. Pakuza JAI, Oxford, United Kingdom P. Burrows, C. Pakuza Oxford University, Physics Department, Oxford, Oxon, United Kingdom D.A. Cooke UCL, London, United Kingdom J. Wolfenden The University of Liverpool, Liverpool, United Kingdom J. Wolfenden Cockcroft Institute, Warrington, Cheshire, United Kingdom
	The Advanced Wakefield Experiment (AWAKE) at CERN investigates the Plasma-Wakefield acceleration of electrons driven by a relativistic proton bunch. After successfully demonstrating the acceleration process in the AWAKE Run 1, the experiment has now started the Run 2. The AWAKE Run 2 consists of several experimental periods that aim to demonstrate the feasibility of the AWAKE concept beyond the acceleration experiment, showing its feasibility as accelerator for particle physics application. As part of these developments, a dramatic effort in improving the AWAKE instrumentation is sustained. This contribution reports on the current developments of the instrumentation pool upgrade, including the digital camera system for transverse beam profile measurement, beam halo measurement and the spectrometer upgrade studies. The studies on the development of high-frequency beam position monitors are also described.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-MOPOPT042
About •	Received ※ 08 June 2022 — Revised ※ 13 June 2022 — Accepted ※ 16 June 2022 — Issue date ※ 23 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FROXGD1	A Method for Obtaining 3D Charge Density Distribution of a Self-Modulated Proton Bunch	3118
	T. Nechaeva, P. Muggli MPI-P, München, Germany L. Verra, G. Zevi Della Porta CERN, Meyrin, Switzerland L. Verra TUM, Munich, Germany L. Verra MPI, Muenchen, Germany
	The Advanced Wakefield Experiment (AWAKE) at CERN is the first plasma wakefield accelerator experiment to use a proton bunch as driver. The long bunch undergoes seeded self-modulation (SSM) in a 10 m-long plasma. SSM transforms the bunch into a train of short micro-bunches that resonantly drive high-amplitude wakefields. We use optical transition radiation (OTR) and a streak camera to obtain time-resolved images of the bunch transverse charge density distribution in a given plane. In this paper we present a method to obtain 3D images of the bunch by scanning the OTR across the entrance slit of the streak camera. Reconstruction of the 3D distribution is possible because with seeding self-modulation is reproducible. The 3D images allow for checking the axi-symmetry of SSM and for detecting the possible presence of the non-axi-symmetric hosing instability (HI). F. Batsch et al., Phys. Rev. Lett. 126, 164802 (2021).
	Slides FROXGD1 [4.026 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-FROXGD1
About •	Received ※ 20 May 2022 — Revised ※ 15 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 30 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

The AWAKE Experiment in 2021: Performance and Preliminary Results on Electron-Seeding of Self-Modulation

21

E. Gschwendtner, L. Verra, G. Zevi Della Porta
CERN, Meyrin, Switzerland
P. Muggli, L. Verra
MPI, Muenchen, Germany
P. Muggli
MPI-P, München, Germany
L. Verra
TUM, Munich, Germany

The future programme of the Advanced Wakefield (AWAKE) experiment at CERN relies on the seeded self-modulation of an entire proton bunch, resulting in phase-reproducible micro-bunches. This important milestone was achieved during the 2021 proton run by injecting a short electron bunch ahead of the proton bunch, demonstrating for the first time the electron-seeding of proton bunch self-modulation. This talk describes the programme, performance and preliminary results of the AWAKE experiment in the 2021 proton run, and introduces the program of the 2022 proton run. The observation of electron-seeded self-modulation opens new avenues of exploration which will be studied in 2022, including the effect of a phase difference between the front and the back of a proton bunch and the possibility of reproducibly seeding the hosing instability using the electron beam.

Slides MOOYGD2 [7.040 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-MOOYGD2

About •

Received ※ 07 June 2022 — Revised ※ 16 June 2022 — Accepted ※ 16 June 2022 — Issue date ※ 16 June 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPOPT042

Recent AWAKE Diagnostics Development and Operational Results

343

E. Senes, S. Burger, M. Krupa, T. Lefèvre, S. Mazzoni, E. Poimenidou, A. Topaloudis, M. Wendt, G. Zevi Della Porta
CERN, Meyrin, Switzerland
P. Burrows, C. Pakuza
JAI, Oxford, United Kingdom
P. Burrows, C. Pakuza
Oxford University, Physics Department, Oxford, Oxon, United Kingdom
D.A. Cooke
UCL, London, United Kingdom
J. Wolfenden
The University of Liverpool, Liverpool, United Kingdom
J. Wolfenden
Cockcroft Institute, Warrington, Cheshire, United Kingdom

The Advanced Wakefield Experiment (AWAKE) at CERN investigates the Plasma-Wakefield acceleration of electrons driven by a relativistic proton bunch. After successfully demonstrating the acceleration process in the AWAKE Run 1, the experiment has now started the Run 2. The AWAKE Run 2 consists of several experimental periods that aim to demonstrate the feasibility of the AWAKE concept beyond the acceleration experiment, showing its feasibility as accelerator for particle physics application. As part of these developments, a dramatic effort in improving the AWAKE instrumentation is sustained. This contribution reports on the current developments of the instrumentation pool upgrade, including the digital camera system for transverse beam profile measurement, beam halo measurement and the spectrometer upgrade studies. The studies on the development of high-frequency beam position monitors are also described.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-MOPOPT042

About •

Received ※ 08 June 2022 — Revised ※ 13 June 2022 — Accepted ※ 16 June 2022 — Issue date ※ 23 June 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FROXGD1

A Method for Obtaining 3D Charge Density Distribution of a Self-Modulated Proton Bunch

3118

T. Nechaeva, P. Muggli
MPI-P, München, Germany
L. Verra, G. Zevi Della Porta
CERN, Meyrin, Switzerland
L. Verra
TUM, Munich, Germany
L. Verra
MPI, Muenchen, Germany

The Advanced Wakefield Experiment (AWAKE) at CERN is the first plasma wakefield accelerator experiment to use a proton bunch as driver. The long bunch undergoes seeded self-modulation (SSM) in a 10 m-long plasma. SSM transforms the bunch into a train of short micro-bunches that resonantly drive high-amplitude wakefields. We use optical transition radiation (OTR) and a streak camera to obtain time-resolved images of the bunch transverse charge density distribution in a given plane. In this paper we present a method to obtain 3D images of the bunch by scanning the OTR across the entrance slit of the streak camera. Reconstruction of the 3D distribution is possible because with seeding self-modulation is reproducible*. The 3D images allow for checking the axi-symmetry of SSM and for detecting the possible presence of the non-axi-symmetric hosing instability (HI).
* F. Batsch et al., Phys. Rev. Lett. 126, 164802 (2021).

Slides FROXGD1 [4.026 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-FROXGD1

About •

Received ※ 20 May 2022 — Revised ※ 15 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 30 June 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)