English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The LINAC at the Los Alamos Neutron Science Center (LANSCE)  has been utilizing the Delta-t method to match the RF cavities to  the design acceleration parameters since its commissioning in 1972.  The differences in time-of-flight between two subsequent Beam  Position and Phase Monitors (BPPMs) are measured with both  accelerated and drifting beams, depending on the whether the module  is set to on or off.  The algorithm optimizes the module amplitude  and phase via iterative measurements if the initial phase is in the  vicinity of the design value.  With an upgrade to a faster readout  system, a scan over the whole RF cavity phase range requires  relatively less time than the classical optimization procedure.  The  Phase Scan Signature Matching (PSSM) method provides a  time-efficient method that ensures the phase selection lands on the  bunching side and empowers future analyses to build module-specific  models.  The PSSM also utilizes a direct model to determine the  correct amplitude to sub-percent level instead of using linearized  matrices.  Furthermore, lacking a reliable energy measurement method  in the LINAC, we measure the beam phases at two downstream locations  to increase the precision of energy measurements.  In this letter,  we also discuss the sensitivities of PSSM, error propagation, and  the implementation results for the 2019 and 2020 beam cycles.

Results of the first implementation of RF phase signature matching at LANSCE