19–24 May 2024
Music City Center
US/Central timezone

High vacuum measurements at a linear inductive accelerator module

TUPR65
21 May 2024, 16:00
2h
Rock 'n Roll (MCC Exhibit Hall A)

Rock 'n Roll

MCC Exhibit Hall A

Poster Presentation MC7.T14 Vacuum Technology Tuesday Poster Session

Speaker

Dr Ilija Draganic (Nevada National Security Site)

Description

We are going to present recent high vacuum pressure measurements recorded at new Prototype Accelerator Module (PAM) of the Advance Sources and Detectors (ASD) – Scorpius project [1]. To avoid the ion-hose instability [2] in our linear inductive accelerator with 2 kA, 20 MeV electron multi-pulse beams during radiographic scans, an advance high vacuum system and accelerator components were being developed. The Scorpius PAM vacuum chamber consists of three induction voltage adder beam lines, vacuum plenums with three different vacuum pumps: turbo-molecular pump (TMP; 1000 l/s), NEG pump (2100 l/s for H2) and ion pump (500 l/s). An ultimate vacuum pressure of 4.0 to 5.0 1e-8 Torr along single PAM vacuum chamber was achieved. Dominant residual gases (H2, H2O, O2, N2, CO, Ar, CO2) were recorded to understand different vacuum pumping speed configurations (NEG-ION configuration or production setup, NEG-ION-TMP pumps ON for vacuum roughing from atmosphere to high vacuum pressure, influences of each pump on different residual gas species in PAM, etc.). Measured results will be discussed and compared with the vacuum pressure simulations.

Footnotes

[1] M. Crawford, and J. Barraza, “Scorpius: The Development of a New Multi-Pulse Radiographic Systems”, IEEE 21st International Conference on Pulsed Power, Brighton, UK 18-22 June 2017, IAN 17563191.
[2] C. Ekdahl, “The Ion-Hose Instability in a High-Current Multi-Pulse Linear Induction Accelerator” IEEE Transactions on Plasma Sciences, Vol 47, No 1, January 2019, page 300-306.

Funding Agency

The U.S. Department of Energy and National Nuclear Security Administration

Region represented North America
Paper preparation format Word

Primary author

Dr Ilija Draganic (Nevada National Security Site)

Co-authors

Heather Andrews (Los Alamos National Laboratory) Jack Gioia (Los Alamos National Laboratory) John Hollabaugh (National Security Technologies, LLC) Mark Chavez (Los Alamos National Laboratory)

Presentation materials

There are no materials yet.