| Paper | Title | Page |
|---|---|---|
| MOP010 | Diagnostics for a High Emittance and High Energy Spread Positron Source | 54 |
|
||
|
Funding: This work was done under the auspices of CHART (chart.ch) This paper is an overview of a diagnostics setup for highly spread e⁺e⁻ beams, to be installed at the PSI Positron Production (P3 or P-cubed) experiment. To be hosted at the SwissFEL facility (PSI, Switzerland) in 2026, P3 is e+ source demonstrator designed to generate, capture, separate and detect nano-Coulombs of secondary e+ and e- bunches, in spite of their extreme tranverse emittance and energy spread. The experiment will employ an arrangement of broadband pick-ups (BBPs) to detect simultaneously the time structure of secondary e⁺e⁻ bunches. A spectrometer will follow the BBPs and deflect the e+ and e- onto two unconventional faraday cups that will measure their charge. In addition, the energy spectrum of e+ and e- distribution will be reconstructed through scintillating fibers. |
||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-IBIC2023-MOP010 | |
| About • | Received ※ 05 September 2023 — Revised ※ 07 September 2023 — Accepted ※ 13 September 2023 — Issue date ※ 25 September 2023 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| TUP026 | Bunch Compressor Monitors for the Characterization of the Electron Bunch Length in a Linac-Driven FEL | 235 |
|
||
|
The lasing performance of a Free Electron Laser (FEL) strongly relies on a precise characterization of the electron bunch length and on the control and stabilization of the bunch compression settings of the machine under normal user operations. In a FEL driver linac, the so-called Bunch Compressor Monitors (BCMs) normally ensure the non-invasive monitoring of the electron bunch length. BCMs, being sensitive to the temporal coherent threshold of the radiation energy emitted by the electron beam crossing the last dipole of a magnetic chicane or a holed diffraction screen just downstream, can provide a bunch length dependent signal resulting from the integration of the detected radiation pulse energy over the acceptance frequency band of the detector. Thanks to the non-invasiveness, BCMs are primary diagnostics in a FEL to stabilize the bunch compression by feeding back the RF settings of the accelerating structure. In this contribution, we present a formal method to determine an absolute measurement of the electron bunch length from the analysis of a BCM signal (*).
(*) G.L. Orlandi, Absolute and non-invasive determination of the electron bunch length in a Free Electron Laser using a Bunch Compressor Monitor, https://doi.org/10.48550/arXiv.2305.17042, https://doi.org/10.21203/rs.3.rs-3228455/v1 |
||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-IBIC2023-TUP026 | |
| About • | Received ※ 06 September 2023 — Revised ※ 08 September 2023 — Accepted ※ 13 September 2023 — Issue date ※ 15 September 2023 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |