Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Lawrence Doolittle"'
Autor:
Hengjie Ma, Mark Champion, Mark Crofford, Kay-Uwe Kasemir, Maurice Piller, Lawrence Doolittle, Alex Ratti
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 9, Iss 3, p 032001 (2006)
The low-level rf control system currently commissioned throughout the Spallation Neutron Source (SNS) LINAC evolved from three design iterations over 1 yr intensive research and development. Its digital hardware implementation is efficient, and has s
Externí odkaz:
https://doaj.org/article/7a77fefbb1b741bd9b453bb43f5beb65
Autor:
Kavitha Goyal, Donald Neblock, Melissa Calmann, Frank Van Gog, Albert DeRitis, Vinod Philip, Lawrence Doolittle, Richard Melsheimer
Publikováno v:
Biodrugs
Biologics are produced from living organisms in complex, multi-stage manufacturing processes and contain inherent variability, which must be understood and controlled during manufacturing to avoid unexpected changes in key quality attributes that may
Autor:
Alex Ratti, M. Placidi, Lawrence Doolittle, S.U. De Silva, Paul Emma, Rocio Olave, Jean Delayen
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 899:32-42
This paper describes beam distribution schemes based on transverse electric field radio-frequency deflectors (RFD) as fast-switching devices and provides numerical relationships between their respective frequencies and phases. The adoption of compact
Publikováno v:
Optics letters, vol 44, iss 18
We demonstrate a new method for controlling diffractive, high-power beam combination, sensing phase errors by analyzing the intensity pattern of uncombined side beams at the output. A square array of eight beams is combined with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f52c6a136c21abcddd7f000e66197eef
https://escholarship.org/uc/item/3zq1z53j
https://escholarship.org/uc/item/3zq1z53j
Autor:
Tong Zhou, Yilun Xu, Lawrence Doolittle, Almantas Galvanauskas, Wim Leemans, Gang Huang, John Ruppe, Yawei Yang, Wenhui Huang, Russell Wilcox, John C. Byrd, Qiang Du, Chuanxiang Tang
Publikováno v:
Xu, Y; Wilcox, R; Byrd, J; Doolittle, L; Du, Q; Huang, G; et al.(2018). FPGA-Based Optical Cavity Phase Stabilization for Coherent Pulse Stacking. IEEE Journal of Quantum Electronics, 54(1), 1-10. doi: 10.1109/JQE.2017.2775698. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/92h0x1fh
© 1965-2012 IEEE. Coherent pulse stacking (CPS) is a new time-domain coherent addition technique that stacks several optical pulses into a single output pulse, enabling high pulse energy from fiber lasers. We develop a robust, scalable, and distribu
Publikováno v:
Conference on Lasers and Electro-Optics.
Autor:
Wim Leemans, Tong Zhou, Lawrence Doolittle, John Ruppe, Almantas Galvanauskas, Yawei Yang, Gang Huang, Qiang Du, Russell Wilcox
Publikováno v:
Journal of the Optical Society of America B: Optical Physics, vol 35, iss 9
Yang, Y; Doolittle, L; Galvanauskas, A; Du, Q; Huang, G; Ruppe, J; et al.(2018). Optical phase control of coherent pulse stacking via modulated impulse response. Journal of the Optical Society of America B: Optical Physics, 35(9), 2081-2090. doi: 10.1364/JOSAB.35.002081. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/2df8m25p
Journal of the Optical Society of America B, vol 35, iss 9
Yang, Y; Doolittle, L; Galvanauskas, A; Du, Q; Huang, G; Ruppe, J; et al.(2018). Optical phase control of coherent pulse stacking via modulated impulse response. Journal of the Optical Society of America B: Optical Physics, 35(9), 2081-2090. doi: 10.1364/JOSAB.35.002081. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/2df8m25p
Journal of the Optical Society of America B, vol 35, iss 9
© 2018 Optical Society of America. To stabilize the combined pulse energy for coherent temporal pulse stacking using interferometer cavities, we have developed a direct cavity phase measurement method based on analysis of the response to modulated p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2b495133ae6052413b2e2bf743d1dc1
https://escholarship.org/uc/item/2df8m25p
https://escholarship.org/uc/item/2df8m25p
Autor:
A. Salom, T. Rohlev, J. Jones, Alex Ratti, C. Serrano, M. Milloch, John C. Byrd, Lawrence Doolittle, F. Gelmetti, M. Predonzani, Gang Huang, A. Fabris, M. W. Stettler, G. D'Auria
Publikováno v:
IEEE Transactions on Nuclear Science. 63:861-868
Specifications on electron beam quality for the operation of a linac-based free-electron laser (FEL), as FERMI in Trieste (Italy), impose stringent requirements on the stability of the electromagnetic fields of the accelerating sections. These specif
Autor:
Lawrence Doolittle, Chuanxiang Tang, Jin Yang, Lixin Yan, Qiang Du, Wenhui Huang, Yingchao Du, Gang Huang, Yilun Xu, Russell Wilcox, Zhenyang Lin
Publikováno v:
Xu, Y; Huang, G; Doolittle, L; Du, Q; Wilcox, R; Yang, J; et al.(2018). High-precision phase detection in femtosecond timing and synchronization system for TXGLS. Measurement Science and Technology, 29(6). doi: 10.1088/1361-6501/aab6f7. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/05q050nf
Measurement Science and Technology, vol 29, iss 6
Measurement Science and Technology, vol 29, iss 6
Author(s): Xu, Y; Huang, G; Doolittle, L; Du, Q; Wilcox, R; Yang, J; Lin, Z; Du, Y; Yan, L; Huang, W; Tang, C | Abstract: High-precision phase detection is critical to the timing and synchronization system for particle accelerators. A live calibratio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17b2163f2195fe2ceb5419778fe2b6e1
http://www.escholarship.org/uc/item/05q050nf
http://www.escholarship.org/uc/item/05q050nf
Autor:
Yawei Yang, Wim Leemans, Almantas Galvanauskas, Lawrence Doolittle, Tong Zhou, Russell Wilcox, Jay W. Dawson, Qiang Du, Gang Huang
Publikováno v:
Conference on Lasers and Electro-Optics.
We have temporally combined 25 equal-amplitude pulses using four cavities, stabilizing cavity round-trip phase by measuring the response to a probe pulse train. Energy enhancement of 18.4 is maintained within 1% RMS.