1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

Characterisation and mitigation of RF knockout

MOPS007
2 Jun 2025, 16:00
2h
Exhibiton Hall A _Salmon (TWTC)

Exhibiton Hall A _Salmon

TWTC

Poster Presentation MC1.A12 Fixed Field Accelerators (FFAs) Monday Poster Session

Speaker

Carl Jolly (Science and Technology Facilities Council)

Description

Beam stacking is a key advantage of Fixed Field alternating gradient Accelerators (FFAs) for high-intensity applications. During stacking, one beam is stored as a coasting beam at the extraction energy while another, incoming beam is accelerated. However, the beam loss mechanism termed RF knockout can occur during stacking and undermine gains in extracted beam current. The accelerating RF program of the incoming beam can cause cumulative displacements in the stored coasting beam and result in significant beam loss. To ensure that beam stacking is a viable technique to extract highest intensities from an FFA, methods to avoid the loss from RF knockout must be established. This study presents results from a series of experiments at the ISIS proton accelerator to characterise and, crucially, to mitigate RF knockout and ensure successful beam stacking with no loss.

Funding Agency

Science and Technology Facilities Council

Region represented Europe
Paper preparation format LaTeX

Author

Carl Jolly (Science and Technology Facilities Council)

Co-authors

Alan Letchford (Science and Technology Facilities Council) Andrew Seville (Science and Technology Facilities Council) Chris Rogers (Science and Technology Facilities Council) David Kelliher (Science and Technology Facilities Council) David Posthuma de Boer (Science and Technology Facilities Council) Dr Jean-Baptiste Lagrange (Science and Technology Facilities Council) Shinji Machida (Science and Technology Facilities Council)

Presentation materials

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