SRF2021 - List of Authors (Solyak, N.)

Paper	Title	Page
TUPTEV005	PIP-II 650 MHz Power Coupler Thermal Studies	490
	H. Jenhani, S. Arsenyev CEA-IRFU, Gif-sur-Yvette, France S. Kazakov, N. Solyak Fermilab, Batavia, Illinois, USA
	The Proton Improvement Plan - II (PIP-II) project is underway at Fermilab with an international collaboration involving CEA in the development and testing of 650 MHz cryomodules. One of the first main contributions of the CEA was the participation in the design efforts for the current 50 KW CW 650 MHz power couplers. This paper reports some of the results of thermal and paramet-ric studies carried out by the CEA on these power couplers
	Poster TUPTEV005 [0.806 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-SRF2021-TUPTEV005
About •	Received ※ 21 June 2021 — Revised ※ 08 February 2022 — Accepted ※ 15 February 2022 — Issue date ※ 03 May 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPTEV017	Processing and Test Result of 650 MHz 50 kW CW Prototype Couplers for PIP-II Project	526
	N. Solyak, B.M. Hanna, S. Kazakov Fermilab, Batavia, Illinois, USA
	For PIP-II project Fermilab is developing 650 MHz couplers to deliver up to 50 kW CW RF power to the superconducting low-beta (LB650) and high-beta (HB650) cavities. To meet project requirements two different designs of the couplers were proposed, one is conventional design with copper plated stainless steel walls. In second design (EM-shielded) a copper screen is used to shield stainless steel wall from electromagnetic field. For prototyping we built two couplers of each type and tested them at 50kW with full reflection at different reflection phases. In each test the assembly of two couplers were processed with DC bias up to +5 kV, starting with short pulses and ramping power up to 100 kW. Final run for 2 hours in CW mode at 50 kW to reach equilibrium temperature regime and qualify couplers. One pair of couplers was also processed without DC bias. Finally, all four couplers demonstrated full requirements and were qualified. Based on test results the conventional coupler with some modification was chosen as a baseline design. Modified version of coupler is now ordered for prototype of HB650 cryomodule. In paper we will discuss details of coupler processing and results
	Poster TUPTEV017 [2.211 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-SRF2021-TUPTEV017
About •	Received ※ 21 June 2021 — Revised ※ 06 August 2021 — Accepted ※ 19 November 2021 — Issue date ※ 08 December 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

PIP-II 650 MHz Power Coupler Thermal Studies

490

H. Jenhani, S. Arsenyev
CEA-IRFU, Gif-sur-Yvette, France
S. Kazakov, N. Solyak
Fermilab, Batavia, Illinois, USA

The Proton Improvement Plan - II (PIP-II) project is underway at Fermilab with an international collaboration involving CEA in the development and testing of 650 MHz cryomodules. One of the first main contributions of the CEA was the participation in the design efforts for the current 50 KW CW 650 MHz power couplers. This paper reports some of the results of thermal and paramet-ric studies carried out by the CEA on these power couplers

Poster TUPTEV005 [0.806 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-SRF2021-TUPTEV005

About •

Received ※ 21 June 2021 — Revised ※ 08 February 2022 — Accepted ※ 15 February 2022 — Issue date ※ 03 May 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPTEV017

Processing and Test Result of 650 MHz 50 kW CW Prototype Couplers for PIP-II Project

526

N. Solyak, B.M. Hanna, S. Kazakov
Fermilab, Batavia, Illinois, USA

For PIP-II project Fermilab is developing 650 MHz couplers to deliver up to 50 kW CW RF power to the superconducting low-beta (LB650) and high-beta (HB650) cavities. To meet project requirements two different designs of the couplers were proposed, one is conventional design with copper plated stainless steel walls. In second design (EM-shielded) a copper screen is used to shield stainless steel wall from electromagnetic field. For prototyping we built two couplers of each type and tested them at 50kW with full reflection at different reflection phases. In each test the assembly of two couplers were processed with DC bias up to +5 kV, starting with short pulses and ramping power up to 100 kW. Final run for 2 hours in CW mode at 50 kW to reach equilibrium temperature regime and qualify couplers. One pair of couplers was also processed without DC bias. Finally, all four couplers demonstrated full requirements and were qualified. Based on test results the conventional coupler with some modification was chosen as a baseline design. Modified version of coupler is now ordered for prototype of HB650 cryomodule. In paper we will discuss details of coupler processing and results

Poster TUPTEV017 [2.211 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-SRF2021-TUPTEV017

About •

Received ※ 21 June 2021 — Revised ※ 06 August 2021 — Accepted ※ 19 November 2021 — Issue date ※ 08 December 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)