Author: Gorelov, D.V.
Paper Title Page
TUPA42 LANSCE Modernization Project at LANL 443
 
  • D.V. Gorelov, J. Barraza, D.A.D. Dimitrov, I. Draganić, E. Henestroza, S.S. Kurennoy
    LANL, Los Alamos, New Mexico, USA
  
  In the frame­work of LAN­SCE Ac­cel­er­a­tor Mod­ern­iza­tion Pro­ject pre­lim­i­nary re­search, dur­ing eval­u­a­tion of crit­i­cal tech­nol­ogy el­e­ments it was found that the pro­posed RFQ de­sign had not yet been demon­strated ex­per­i­men­tally world­wide. Such an RFQ should com­bine the abil­ity of tra­di­tional light ion RFQs (i.e., [1]) and the flex­i­bil­ity of ac­cel­er­a­tion of pre-bunched beams, like RFQs for heavy ions [2]. The pro­posed RFQ should be able to ac­cel­er­ate H+ and H− beams with 35-mA beam cur­rent from 100 keV to 3 MeV and at the same time pre­serve the pre­scribed macro-bunch beam time struc­ture re­quired by ex­per­i­ments. New al­go­rithms for RFQ geom­e­try gen­er­a­tion have been pro­posed, and op­ti­miza­tion al­go­rithms are being de­vel­oped at LANL. LAMP demon­stra­tion plans also in­clude de­vel­op­ment of a new set of elec­trodes for the ex­ist­ing RFQ at our Test Stand that will allow us to demon­strate the crit­i­cal tech­nol­ogy ahead of time in a lab­o­ra­tory ex­per­i­men­tal setup with low duty fac­tor and low en­ergy.
[1] S. Henderson et al., Nucl. Instrum. Methods Phys. Res., Sect. A, v. 763, pp. 610-673 (2014).
[2] H. Ren et al., J. Phys. Conf. Ser., v. 1067, 052010 (2018). 		 
poster icon Poster TUPA42 [0.635 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-TUPA42  
About • Received ※ 04 August 2022 — Revised ※ 05 August 2022 — Accepted ※ 09 August 2022 — Issue date ※ 18 August 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPA57 Electromagnetic and Beam Dynamics Modeling of the LANSCE Coupled-Cavity Linac 472
 
  • S.S. Kurennoy, Y.K. Batygin, D.V. Gorelov
    LANL, Los Alamos, New Mexico, USA
  
  The 800-MeV pro­ton linac at LAN­SCE con­sists of a drift-tube linac, which brings the beam to 100 MeV, fol­lowed by a cou­pled-cav­ity linac (CCL) con­sist­ing of 44 mod­ules. Each CCL mod­ule con­tains mul­ti­ple tanks, and it is fed by a sin­gle 805-MHz kly­stron. CCL tanks are multi-cell blocks of iden­ti­cal re-en­trant side-cou­pled cav­i­ties, which are fol­lowed by drifts with mag­netic quadru­pole dou­blets. Bridge cou­plers - spe­cial cav­i­ties dis­placed from the beam axis - elec­tro­mag­net­i­cally cou­ple CCL tanks over such drifts. We have de­vel­oped 3D CST mod­els of CCL tanks. Their elec­tro­mag­netic analy­sis is per­formed using Mi­croWave Stu­dio. Beam dy­nam­ics is mod­eled with Par­ti­cle Stu­dio for bunch trains with re­al­is­tic beam dis­tri­b­u­tions using the CST cal­cu­lated RF fields and quadru­pole mag­netic fields to de­ter­mine the out­put beam pa­ra­me­ters. Beam dy­nam­ics re­sults are cross­checked with other multi-par­ti­cle codes.  
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-TUPA57  
About • Received ※ 15 July 2022 — Revised ※ 01 August 2022 — Accepted ※ 08 August 2022 — Issue date ※ 19 August 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPA75 High Gradient Testing Results of the Benchmark a/λ=0.105 Cavity at CERF-NM 505
 
  • M.R.A. Zuboraj, D.V. Gorelov, T.W. Hall, M.E. Middendorf, D. Rai, E.I. Simakov, T. Tajima
    LANL, Los Alamos, New Mexico, USA
  
  Funding: This work was supported by Los Alamos National Laboratory’s Laboratory Directed Research and Development (LDRD) Program.
This pre­sen­ta­tion will re­port ini­tial re­sults of high gra­di­ent test­ing of two C-band ac­cel­er­at­ing cav­i­ties fab­ri­cated at Los Alamos Na­tional Lab­o­ra­tory (LANL). At LANL, we com­mis­sioned a C-band En­gi­neer­ing Re­search Fa­cil­ity of New Mex­ico (CERF-NM) which has unique ca­pa­bil­ity of con­di­tion­ing and test­ing ac­cel­er­at­ing cav­i­ties for op­er­a­tion at sur­face elec­tric fields at the ex­cess of 300 MV/m, pow­ered by a 50 MW, 5.712 GHz Canon kly­stron. Re­cently, we fab­ri­cated and tested two bench­mark cop­per cav­i­ties at CERF-NM. These cav­i­ties es­tab­lish a bench­mark for high gra­di­ent per­for­mance at C-band and the same geom­e­try will be used to pro­vide di­rect com­par­i­son be­tween high gra­di­ent per­for­mance of cav­i­ties fab­ri­cated of dif­fer­ent al­loys and by dif­fer­ent fab­ri­ca­tion meth­ods. The cav­i­ties con­sist of three cells with one high gra­di­ent cen­tral cell and two cou­pling cells on the sides. The ratio of the ra­dius of the cou­pling iris to the wave­length is a/λ=0.105. This poster will re­port high gra­di­ent test re­sults such as break­down rates as func­tion of peak sur­face elec­tric and mag­netic fields and pulse heat­ing. 		 
poster icon Poster TUPA75 [0.890 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-TUPA75  
About • Received ※ 05 August 2022 — Revised ※ 11 August 2022 — Accepted ※ 12 August 2022 — Issue date ※ 01 October 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THYD3 Update on the Status of C-Band Research and Facilities at LANL 855
 
  • E.I. Simakov, A.M. Alexander, D.V. Gorelov, T.W. Hall, M.E. Middendorf, D. Rai, T. Tajima, M.R.A. Zuboraj
    LANL, Los Alamos, New Mexico, USA
  
  Funding: Los Alamos National Laboratory LDRD Program
We will re­port on the sta­tus of two C-band test fa­cil­i­ties at Los Alamos Na­tional Lab­o­ra­tory (LANL): C-band En­gi­neer­ing Re­search Fa­cil­ity in New Mex­ico (CERF-NM), and Cath­odes and Rf In­ter­ac­tions in Ex­tremes (CARIE). Mod­ern ap­pli­ca­tions such as X-ray sources re­quire ac­cel­er­a­tors with op­ti­mized cost of con­struc­tion and op­er­a­tion, nat­u­rally call­ing for high-gra­di­ent ac­cel­er­a­tion. At LANL we com­mis­sioned a high gra­di­ent test stand pow­ered by a 50 MW, 5.712 GHz Canon kly­stron. CERF-NM is the first high gra­di­ent C-band test fa­cil­ity in the United States. It was fully com­mis­sioned in 2021. In the last year, mul­ti­ple C-band high gra­di­ent cav­i­ties and com­po­nents were tested at CERF-NM. Cur­rently we work to im­ple­ment sev­eral up­dates to the test stand in­clud­ing the abil­ity to re­mot­edly op­er­ate at high gra­di­ent for the round-the-clock high gra­di­ent con­di­tion­ing. Adding ca­pa­bil­ity to op­er­ate at cryo­genic tem­per­a­tures is con­sid­ered. The con­struc­tion of CARIE will begin in Oc­to­ber of 2022. CARIE will house a cryo-cooled cop­per RF pho­toin­jec­tor with a high quan­tum-ef­fi­ciency cath­ode and a high gra­di­ent ac­cel­er­a­tor sec­tion. 		 
slides icon Slides THYD3 [3.331 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-THYD3  
About • Received ※ 31 July 2022 — Revised ※ 08 August 2022 — Accepted ※ 12 August 2022 — Issue date ※ 04 October 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)