IPAC'23 - 14th International Particle Accelerator Conference

S-Band Accelerating Cells Geometry RF Measurements Technique for Pre-Tuning and Smart Combination

THPM037

11 May 2023, 16:30

2h

Sala Mosaici 2

Poster Presentation MC7.T35: Advanced Manufacturing Technologies for Accelerator Components Thursday Poster Session

Speaker

Armen Grigoryan (Yerevan State University)

Description

The upgrade program for AREAL accelerator includes beam energy increase from 5 MeV up to 50 MeV. For this purpose, two 43 cells, and 1.6 m long, S-band accelerating structures are foreseen. The design and fabrication of cells are already carried out in CANDLE. For effective acceleration the tuning of phase advance and frequency of the structure is necessary. The precise geometrical dimension measurements to pick the proper sequence of cells are necessary to minimize accelerator structure tuning routine after brazing.
In this paper, a method for cell geometry precise measurements is presented. The method based on TM resonance frequencies measurement for radius and length variation evaluation in µm range. The µm variation driving resonance frequency shift by few tens’ kHz, which is measurable by conventional VNA. The theoretical basis and experimental results for AREAL 50 MeV upgrade accelerator structures cells are presented.