NAPAC2016 - List of Authors (Shaftan, T.V.)

Paper	Title	Page
TUPOB50	Beam-Induced Heating of the Kicker Ceramics Chambers at NSLS-II	599
	A. Blednykh, B. Bacha, G. Bassi, G. Ganetis, C. Hetzel, H.-C. Hseuh, T.V. Shaftan, V.V. Smaluk, G.M. Wang BNL, Upton, Long Island, New York, USA
	Funding: This work was supported by Department of Energy contract DE-AC02-98CH10886. First experience with the beam-induced heating of the ceramics chambers in the NSLS-II storage ring has been discussed. Total five ceramics chambers are considered to be replaced due to overheating concern during of upcoming I_av=500mA operations. The air cooling fans has been installed as a temporarily solution to remove heat.
	Poster TUPOB50 [1.629 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB50
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TUPOB56	The eRHIC Ring-Ring Design	616
	C. Montag, G. Bassi, J. Beebe-Wang, J.S. Berg, M. Blaskiewicz, A.V. Fedotov, W. Fischer, Y. Hao, A. Hershcovitch, Y. Luo, R.B. Palmer, B. Parker, S. Peggs, V. Ptitsyn, V.H. Ranjbar, S. Seletskiy, T.V. Shaftan, V.V. Smaluk, S. Tepikian, F.J. Willeke, H. Witte, Q. Wu BNL, Upton, Long Island, New York, USA
	The ring-ring version of the eRHIC electron-ion collider design aims at providing electron-proton collisions with a center-of-mass energy ranging from 32 to 141 GeV at a luminosity reaching 10³³ cm^-2 sec^-1. This design of the double-ring collider also supports electron-ion collisions with similar electron-nucleon luminosities, and is upgradeable to 10³⁴ cm^-2 sec^-1 using bunched beam electron cooling of the hadron beam. The baseline luminosities are achievable using existing technologies and beam parameters that have been routinely achieved at RHIC in hadron-hadron collisions or elsewhere in e⁺e⁻ collisions. This minimizes the risk associated with the challenging luminosity goal and is keeping the technical risk of the e-RHIC electron-ion collider low. The latest design status will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB56
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WEPOA24	Installation and Commissioning of an Ultrafast Electron Diffraction Facility as Part of the ATF-II Upgrade	742
	M.A. Palmer, M. Babzien, M.G. Fedurin, C. Folz, M. Fulkerson, K. Kusche, J.J. Li, R. Malone, T.V. Shaftan, J. Skaritka, L. Snydstrup, C. Swinson, F.J. Willeke BNL, Upton, Long Island, New York, USA
	Funding: This work was funded by the US Department of Energy under contract DE-SC0012704. The Accelerator Test Facility (ATF) at Brookhaven National Laboratory (BNL) is presently carrying out an upgrade, ATF-II, which will provide significantly expanded experimental space and capabilities for its users. One of the new capabilities being integrated into the ATF-II program is an Ultrafast Electron Diffraction (UED) beam line, which was originally deployed in the BNL Source Development Laboratory. Inclusion of the UED in the ATF-II research portfolio will enable ongoing development and extension of the UED capabilities for use in materials research. We discuss the design, installation and commissioning of the UED beam line at ATF-II as well as plans for future upgrades.
	Poster WEPOA24 [18.332 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA24
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WEPOB65	Experiments of Lossless Crossing - Resonance With Tune Modulation by Synchrotron Oscillations	1036
	G.M. Wang, B. Holub, Y. Li, J. Rose, T.V. Shaftan, V.V. Smaluk BNL, Upton, Long Island, New York, USA
	It had become a standard practice to constrain particle's tune footprint while designing the storage ring lattice so that the tunes fit between harmful resonances that limit ring dynamic aperture (DA). However, in recent ultra-bright light source design, the nonlinearities of storage ring lattices are much enhanced as compared with the 3rd generation light source one. It is becoming more and more difficult to keep the off-momentum tune footprint confined and even more, the solution cannot be found to confine off-energy tune footprint in certain cases. The questions have been asked whether crossing of a resonance stopband from off-momentum particle will necessarily lead to particle loss. In NSLS-II, we modified the lattice working point to mimic machine tune footprint crossing half integer with beam synchrotron oscillation excitation and demonstrated that beam can cross a resonance without loss with control of stopband width and high order chromaticity.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB65
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WEPOB66	NSLS-II Post Mortem Function Development and Data Analysis of Beam Dump	1039
	G.M. Wang, W.X. Cheng, J. Choi, L. Doom, K. Ha, T.V. Shaftan, R.M. Smith, J. Tagger, Y. Tian BNL, Upton, Long Island, New York, USA R.V. Madelon University of Orleans, Orleans, France
	The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven National Laboratory. The storage ring was commissioned in 2014 and transitioned to routine operations in the December of the same year. At this point the facility hosts 14 operating beam lines with beam current upto 250 mA. During beamline operation, various sources (protection system or subsystem malfunction) may cause beam dump. To identify the beam trip sources and improve the operation reliability, post mortem function was developed in NSLS-II to capture the sub-systems status and beam information prior and after beam dump, including RF system, power supply, BPMs and active interlock system. Most of the trip events have been identified and related source was improved. In this paper, we'll present the post mortem function and data application.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB66
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THB3CO04	Technology Development Toward High Duty Cycle Inverse Compton Scattering X-Ray Source
WEPOB46	use link to see paper's listing under its alternate paper code
	A.Y. Murokh, R.B. Agustsson, T.J. Campese, A.G. Ovodenko RadiaBeam, Santa Monica, California, USA M. Babzien, M.G. Fedurin, I. Pogorelsky, M.N. Polyanskiy, T.V. Shaftan, C. Swinson BNL, Upton, Long Island, New York, USA J.B. Rosenzweig, Y. Sakai UCLA, Los Angeles, California, USA
	An important challenge in the development of practical X-ray sources based on Inverse Compton Scattering is the implementation of a reliable, increased-repetition-rate operation cycle. To this end, we report the first demonstration of an actively re-amplified CO2 laser intra-cavity ICS source, which matches the electron linac pulse structure at 40 MHz repetition rate. Multi-bunch interaction with 5- and 15-pulse trains was demonstrated, and near linear photon yield gain from multi-pulse interaction was demonstrated. The system shows noticeably higher operational reliability than several contemporary single shot systems, as well as a great potential for future scalability.
	Slides THB3CO04 [2.320 MB]
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Paper

Title

Page

Beam-Induced Heating of the Kicker Ceramics Chambers at NSLS-II

599

A. Blednykh, B. Bacha, G. Bassi, G. Ganetis, C. Hetzel, H.-C. Hseuh, T.V. Shaftan, V.V. Smaluk, G.M. Wang
BNL, Upton, Long Island, New York, USA

Funding: This work was supported by Department of Energy contract DE-AC02-98CH10886.
First experience with the beam-induced heating of the ceramics chambers in the NSLS-II storage ring has been discussed. Total five ceramics chambers are considered to be replaced due to overheating concern during of upcoming I_av=500mA operations. The air cooling fans has been installed as a temporarily solution to remove heat.

Poster TUPOB50 [1.629 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB50

Export •

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TUPOB56

The eRHIC Ring-Ring Design

616

C. Montag, G. Bassi, J. Beebe-Wang, J.S. Berg, M. Blaskiewicz, A.V. Fedotov, W. Fischer, Y. Hao, A. Hershcovitch, Y. Luo, R.B. Palmer, B. Parker, S. Peggs, V. Ptitsyn, V.H. Ranjbar, S. Seletskiy, T.V. Shaftan, V.V. Smaluk, S. Tepikian, F.J. Willeke, H. Witte, Q. Wu
BNL, Upton, Long Island, New York, USA

The ring-ring version of the eRHIC electron-ion collider design aims at providing electron-proton collisions with a center-of-mass energy ranging from 32 to 141 GeV at a luminosity reaching 10³³ cm^-2 sec^-1. This design of the double-ring collider also supports electron-ion collisions with similar electron-nucleon luminosities, and is upgradeable to 10³⁴ cm^-2 sec^-1 using bunched beam electron cooling of the hadron beam. The baseline luminosities are achievable using existing technologies and beam parameters that have been routinely achieved at RHIC in hadron-hadron collisions or elsewhere in e⁺e⁻ collisions. This minimizes the risk associated with the challenging luminosity goal and is keeping the technical risk of the e-RHIC electron-ion collider low. The latest design status will be presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB56

Export •

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WEPOA24

Installation and Commissioning of an Ultrafast Electron Diffraction Facility as Part of the ATF-II Upgrade

742

M.A. Palmer, M. Babzien, M.G. Fedurin, C. Folz, M. Fulkerson, K. Kusche, J.J. Li, R. Malone, T.V. Shaftan, J. Skaritka, L. Snydstrup, C. Swinson, F.J. Willeke
BNL, Upton, Long Island, New York, USA

Funding: This work was funded by the US Department of Energy under contract DE-SC0012704.
The Accelerator Test Facility (ATF) at Brookhaven National Laboratory (BNL) is presently carrying out an upgrade, ATF-II, which will provide significantly expanded experimental space and capabilities for its users. One of the new capabilities being integrated into the ATF-II program is an Ultrafast Electron Diffraction (UED) beam line, which was originally deployed in the BNL Source Development Laboratory. Inclusion of the UED in the ATF-II research portfolio will enable ongoing development and extension of the UED capabilities for use in materials research. We discuss the design, installation and commissioning of the UED beam line at ATF-II as well as plans for future upgrades.

Poster WEPOA24 [18.332 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA24

Export •

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WEPOB65

Experiments of Lossless Crossing - Resonance With Tune Modulation by Synchrotron Oscillations

1036

G.M. Wang, B. Holub, Y. Li, J. Rose, T.V. Shaftan, V.V. Smaluk
BNL, Upton, Long Island, New York, USA

It had become a standard practice to constrain particle's tune footprint while designing the storage ring lattice so that the tunes fit between harmful resonances that limit ring dynamic aperture (DA). However, in recent ultra-bright light source design, the nonlinearities of storage ring lattices are much enhanced as compared with the 3rd generation light source one. It is becoming more and more difficult to keep the off-momentum tune footprint confined and even more, the solution cannot be found to confine off-energy tune footprint in certain cases. The questions have been asked whether crossing of a resonance stopband from off-momentum particle will necessarily lead to particle loss. In NSLS-II, we modified the lattice working point to mimic machine tune footprint crossing half integer with beam synchrotron oscillation excitation and demonstrated that beam can cross a resonance without loss with control of stopband width and high order chromaticity.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB65

Export •

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

WEPOB66

NSLS-II Post Mortem Function Development and Data Analysis of Beam Dump

1039

G.M. Wang, W.X. Cheng, J. Choi, L. Doom, K. Ha, T.V. Shaftan, R.M. Smith, J. Tagger, Y. Tian
BNL, Upton, Long Island, New York, USA
R.V. Madelon
University of Orleans, Orleans, France

The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven National Laboratory. The storage ring was commissioned in 2014 and transitioned to routine operations in the December of the same year. At this point the facility hosts 14 operating beam lines with beam current upto 250 mA. During beamline operation, various sources (protection system or subsystem malfunction) may cause beam dump. To identify the beam trip sources and improve the operation reliability, post mortem function was developed in NSLS-II to capture the sub-systems status and beam information prior and after beam dump, including RF system, power supply, BPMs and active interlock system. Most of the trip events have been identified and related source was improved. In this paper, we'll present the post mortem function and data application.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB66

Export •

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

THB3CO04

Technology Development Toward High Duty Cycle Inverse Compton Scattering X-Ray Source

WEPOB46

use link to see paper's listing under its alternate paper code

A.Y. Murokh, R.B. Agustsson, T.J. Campese, A.G. Ovodenko
RadiaBeam, Santa Monica, California, USA
M. Babzien, M.G. Fedurin, I. Pogorelsky, M.N. Polyanskiy, T.V. Shaftan, C. Swinson
BNL, Upton, Long Island, New York, USA
J.B. Rosenzweig, Y. Sakai
UCLA, Los Angeles, California, USA

An important challenge in the development of practical X-ray sources based on Inverse Compton Scattering is the implementation of a reliable, increased-repetition-rate operation cycle. To this end, we report the first demonstration of an actively re-amplified CO2 laser intra-cavity ICS source, which matches the electron linac pulse structure at 40 MHz repetition rate. Multi-bunch interaction with 5- and 15-pulse trains was demonstrated, and near linear photon yield gain from multi-pulse interaction was demonstrated. The system shows noticeably higher operational reliability than several contemporary single shot systems, as well as a great potential for future scalability.

Slides THB3CO04 [2.320 MB]

Export •

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