We propose an innovative method to shift the transversal position of the focal point of an optical cavity keeping it actively frequency stabilized. Our cavity is a 4 mirrors bow-tie cavity and the spatial shift of the resonant mode is obtained by properly rotating the two curved mirrors by piezo actuators. This method allows us to move the transversal position of the cavity focal point of 135µm in a time of 50ms, keeping the resonance condition of the cavity by means of the Pound–Drever–Hall technique. We propose to use this technique for the generation of 2-color X-rays via Inverse Compton Scattering (ICS). This technique exploits the large average power stored in the high finesse cavity by shifting the laser beam with respect to the electron beam trajectory, hence controlling the spatial superposition of the electron and photon beams in the interaction region. Arranging two cavities assembled one on top of the other, with different collision angle with the electron beam, allows the generation of X-ray bursts of different energies just by swiftly moving the two cavities, switching the two focal points onto the electron beam trajectory, thus activating in sequence two different ICS spectral lines.

A new method for spatial mode shifting of stabilized optical cavities for the generation of dual-color X-rays / E. Suerra, D. Giannotti, F. Canella, I. Drebot, S. Capra, D. Cipriani, G. Mettivier, G. Galzerano, P. Cardarelli, S. Cialdi, L. Serafini. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 1019(2021 Dec 11), pp. 165852.1-165852.7. [10.1016/j.nima.2021.165852]

A new method for spatial mode shifting of stabilized optical cavities for the generation of dual-color X-rays

E. Suerra
Primo
;
S. Capra;D. Cipriani;S. Cialdi
Penultimo
;
2021

Abstract

We propose an innovative method to shift the transversal position of the focal point of an optical cavity keeping it actively frequency stabilized. Our cavity is a 4 mirrors bow-tie cavity and the spatial shift of the resonant mode is obtained by properly rotating the two curved mirrors by piezo actuators. This method allows us to move the transversal position of the cavity focal point of 135µm in a time of 50ms, keeping the resonance condition of the cavity by means of the Pound–Drever–Hall technique. We propose to use this technique for the generation of 2-color X-rays via Inverse Compton Scattering (ICS). This technique exploits the large average power stored in the high finesse cavity by shifting the laser beam with respect to the electron beam trajectory, hence controlling the spatial superposition of the electron and photon beams in the interaction region. Arranging two cavities assembled one on top of the other, with different collision angle with the electron beam, allows the generation of X-ray bursts of different energies just by swiftly moving the two cavities, switching the two focal points onto the electron beam trajectory, thus activating in sequence two different ICS spectral lines.
Compton; Laser; Scattering; X-rays
Settore FIS/03 - Fisica della Materia
11-dic-2021
ott-2021
Article (author)
File in questo prodotto:
File Dimensione Formato  
mode_shifting.pdf

accesso aperto

Tipologia: Pre-print (manoscritto inviato all'editore)
Dimensione 623.71 kB
Formato Adobe PDF
623.71 kB Adobe PDF Visualizza/Apri
1-s2.0-S0168900221008378-main.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 699.89 kB
Formato Adobe PDF
699.89 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/904921
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 8
social impact