Related papers: Operational experience with crab cavities at KEKB

Design, prototyping and testing of a compact superconducting double quarter wave crab cavity

A novel design of superconducting Crab Cavity was proposed and designed at Brookhaven National Laboratory. The new cavity shape is a Double Quarter Wave or DQWCC. After fabrication and surface treatments, the niobium proof-of-principle…

Accelerator Physics · Physics 2015-05-20 Binping Xiao , Luís Alberty , Sergey Belomestnykh , Ilan Ben-Zvi , Rama Calaga , Chris Cullen , Ofelia Capatina , Lee Hammons , Zenghai Li , Carlos Marques , John Skaritka , Silvia Verdú-Andres , Qiong Wu

INTEGRAL Cross-calibration Status: Crab observations between 3 keV and 1 MeV

We present results of Crab observations by the INTEGRAL instruments. A simultaneous fit allows us to demonstrate that INTEGRAL provides reliable spectra over its wide energy range.

Astrophysics · Physics 2010-04-30 E. Jourdain , D. Gotz , N. J. Westergaard , L. Natalucci , J. P. Roques

The Non-Uniform Expansion of the Crab Nebula

We present extensive proper motion measurements of the Crab Nebula made from Canada-France-Hawaii Telescope MegaPrime/MegaCam images taken in 2007, 2016, and 2019. A total of 19974 proper motion vectors with uncertainty…

High Energy Astrophysical Phenomena · Physics 2025-10-29 T. Martin , D. Milisavljevic , T. Temim , S. Mandal , P. Duffell , L. Drissen , Z. Ding

Optimization of performance of the KM2A full array using the Crab Nebula

The full array of the Large High Altitude Air Shower Observatory (LHAASO) has been in operation since July 2021. For its kilometer-square array (KM2A), we have optimized the selection criteria for very high and ultra-high energy…

Instrumentation and Methods for Astrophysics · Physics 2024-01-04 LHAASO collaboration

2003-2019 Monitoring of the Crab emission through INTEGRAL SPI, or vice versa

The Crab Nebula is used by many instruments as a calibration source, in particular at high energy, where it is one of the brightest celestial object. The spectrometer INTEGRAL SPI (20 keV - 8 MeV), in operation since October 2002, offers a…

High Energy Astrophysical Phenomena · Physics 2020-09-02 E. Jourdain , J. P. Roques

Energy Spectrum of TeV Gamma-Rays from Crab Nebula

The Crab Nebula has been observed by the HEGRA stereoscopic system of 4 imaging air Cherenkov telescopes (IACTs) for about 100 hours from 1997 September to 1998 March. The recent detailed studies on the system performance give an energy…

Astrophysics · Physics 2019-08-14 A. Konopelko

The observation of the Crab Nebula with LHAASO-KM2A for the performance study

As a sub-array of the Large High Altitude Air Shower Observatory (LHAASO), KM2A is mainly designed to cover a large fraction of the northern sky to hunt for gamma-ray sources at energies above 10 TeV. Even though the detector construction…

High Energy Astrophysical Phenomena · Physics 2021-02-09 F. Aharonian , Q. An , Axikegu , L. X. Bai , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , H. Cai , J. T. Cai , Z. Cao , Z. Cao , J. Chang , J. F. Chang , X. C. Chang , B. M. Chen , J. Chen , L. Chen , L. Chen , L. Chen , M. J. Chen , M. L. Chen , Q. H. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , X. L. Chen , Y. Chen , N. Cheng , Y. D. Cheng , S. W. Cui , X. H. Cui , Y. D. Cui , B. Z. Dai , H. L. Dai , Z. G. Dai , Danzengluobu , D. della Volpe , B. D'Ettorre Piazzoli , X. J. Dong , J. H. Fan , Y. Z. Fan , Z. X. Fan , J. Fang , K. Fang , C. F. Feng , L. Feng , S. H. Feng , Y. L. Feng , B. Gao , C. D. Gao , Q. Gao , W. Gao , M. M. Ge , L. S. Geng , G. H. Gong , Q. B. Gou , M. H. Gu , J. G. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , Y. A. Han , H. H. He , H. N. He , J. C. He , S. L. He , X. B. He , Y. He , M. Heller , Y. K. Hor , C. Hou , X. Hou , H. B. Hu , S. Hu , S. C. Hu , X. J. Hu , D. H. Huang , Q. L. Huang , W. H. Huang , X. T. Huang , Z. C. Huang , F. Ji , X. L. Ji , H. Y. Jia , K. Jiang , Z. J. Jiang , C. Jin , D. Kuleshov , K. Levochkin , B. B. Li , C. Li , C. Li , F. Li , H. B. Li , H. C. Li , H. Y. Li , J. Li , K. Li , W. L. Li , X. Li , X. Li , X. R. Li , Y. Li , Y. Z. Li , Z. Li , Z. Li , E. W. Liang , Y. F. Liang , S. J. Lin , B. Liu , C. Liu , D. Liu , H. Liu , H. D. Liu , J. Liu , J. L. Liu , J. S. Liu , J. Y. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , Y. N. Liu , Z. X. Liu , W. J. Long , R. Lu , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , J. R. Mao , A. Masood , W. Mitthumsiri , T. Montaruli , Y. C. Nan , B. Y. Pang , P. Pattarakijwanich , Z. Y. Pei , M. Y. Qi , D. Ruffolo , V. Rulev , A. Sáiz , L. Shao , O. Shchegolev , X. D. Sheng , J. R. Shi , H. C. Song , Yu. V. Stenkin , V. Stepanov , Q. N. Sun , X. N. Sun , Z. B. Sun , P. H. T. Tam , Z. B. Tang , W. W. Tian , B. D. Wang , C. Wang , H. Wang , H. G. Wang , J. C. Wang , J. S. Wang , L. P. Wang , L. Y. Wang , R. N. Wang , W. Wang , W. Wang , X. G. Wang , X. J. Wang , X. Y. Wang , Y. D. Wang , Y. J. Wang , Y. P. Wang , Z. Wang , Z. Wang , Z. H. Wang , Z. X. Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , C. Y. Wu , H. R. Wu , S. Wu , W. X. Wu , X. F. Wu , S. Q. Xi , J. Xia , J. J. Xia , G. M. Xiang , G. Xiao , H. B. Xiao , G. G. Xin , Y. L. Xin , Y. Xing , D. L. Xu , R. X. Xu , L. Xue , D. H. Yan , C. W. Yang , F. F. Yang , J. Y. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , S. B. Yang , Y. H. Yao , Z. G. Yao , Y. M. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Y. H. Yu , Q. Yuan , H. D. Zeng , T. X. Zeng , W. Zeng , Z. K. Zeng , M. Zha , X. X. Zhai , B. B. Zhang , H. M. Zhang , H. Y. Zhang , J. L. Zhang , J. W. Zhang , L. Zhang , L. Zhang , L. X. Zhang , P. F. Zhang , P. P. Zhang , R. Zhang , S. R. Zhang , S. S. Zhang , X. Zhang , X. P. Zhang , Y. Zhang , Y. Zhang , Y. F. Zhang , Y. L. Zhang , B. Zhao , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , F. Zheng , Y. Zheng , B. Zhou , H. Zhou , J. N. Zhou , P. Zhou , R. Zhou , X. X. Zhou , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , X. Zuo

A Search for Short-term Variability in the Very High Energy Gamma-ray Emission from the Crab Nebula

The Crab Nebula has long been considered a standard candle in high energy astrophysics, but in recent years this assumption has been strongly contradicted in keV-GeV wavebands. In light of these developments, a search for variability is…

High Energy Astrophysical Phenomena · Physics 2015-06-11 Anna O'Faoláin de Bhróithe

Simulation of beam-beam induced emittance growth in the HL-LHC with crab cavities

The emittance growth in the HL-LHC due to beam-beam effects is examined by virtue of strong-strong computer simulations. A model of the transverse damper and the noise level have been tuned to simulate the emittance growth in the present…

Accelerator Physics · Physics 2014-10-23 S. Paret , J. Qiang

Observations of the Crab Nebula with the HEGRA system of IACTs in convergent mode using a topological trigger

Routine observations of the Crab Nebula for a total of about 250 hrs, performed with the HEGRA stereoscopic system of 5 imaging atmospheric Cerenkov telescopes in the standard operational mode, have proven the energy threshold of the system…

Astrophysics · Physics 2009-11-07 F. Lucarelli , A. Konopelko , F. Aharonian , W. Hofmann , A. Kohnle , H. Lampeitl , V. Fonseca

LHCb commissioning and readiness for first data

LHCb has been installed by spring 2008, followed by intensive testing and commissioning of the system in order to be ready for first data taking. Despite the horizontal geometry of the LHCb detector it was possible to collect over one…

Instrumentation and Detectors · Physics 2019-08-13 Helge Voss

SuperKEKB Collider

SuperKEKB, a 7 GeV electron - 4 GeV positron double-ring collider, is constructed by upgrading KEKB in order to seek new physics beyond the Standard Model. The design luminosity of SuperKEKB is 8 x 10^35 /cm^2 /s - 40 times higher than that…

Accelerator Physics · Physics 2023-12-07 Kazunori Akai , Kazuro Furukawa , Haruyo Koiso

Development of Rebunching Cavities at IAP

A focus of work at IAP has been the development and optimization of spiral loaded cavities since the 1970s [A. Schempp et al, NIM 135, 409 (1976)]. These cavities feature a high efficiency, a compact design and a big variety of possible…

Accelerator Physics · Physics 2007-05-23 C. P. Welsch , K. -U. Kuehnel , A. Schempp

Negative Momentum Compaction at KEKB

KEKB is a high luminosity e+e- collider for studying B mesons and has achieved the design luminosity of 1034cm-2s-1 in 2003. In order to get higher luminosity, we tested negative momentum compaction optics in the summer of 2003. We measured…

Accelerator Physics · Physics 2007-05-23 H. Ikeda , J. W. Flanagan , H. Fukuma , S. Hiramatsu , T. Ieiri , H. Koiso , T. Mimashi , T. Mitsuhashi

Spatially resolved polarization variation of the Crab Nebula

We examined the spatially resolved polarization variations in the Crab Nebula over 2 yr, using observational data from the Imaging X-ray Polarimetry Explorer, and offer key insights into its magnetic field structures and evolution. The…

High Energy Astrophysical Phenomena · Physics 2025-04-15 Chao Zuo , Fei Xie , Mingyu Ge , Wei Deng , Kuan Liu , Fabio La Monaca , Alessandro Di Marco , Wenhao Wei , Wei Chen

RF Test Results from Cryomodule 1 at the Fermilab SRF Beam Test Facility

Powered operation of Cryomodule 1 (CM-1) at the Fermilab SRF Beam Test Facility began in late 2010. Since then a series of tests first on the eight individual cavities and then the full cryomodule have been performed. We report on the…

Accelerator Physics · Physics 2012-09-19 E. Harms , K. Carlson , B. Chase , E. Cullerton , A. Hocker , C. Jensen , P. Joireman , A. Klebaner , T. Kubicki , M. Kucera , A. Legan , J. Leibfritz , A. Martinez , M. McGee , S. Nagaitsev , O. Nezhevenko , D. Nicklaus , H. Pfeffer , Y. Pischalnikov , P. Prieto , J. Reid , W. Schappert , V. Tupikov , P. Varghese , J. Branlard

Optical phase coherent timing of the Crab nebula pulsar with Iqueye at the ESO New Technology Telescope

The Crab nebula pulsar was observed in 2009 January and December with a novel very fast optical photon counter, Iqueye, mounted at the ESO 3.5 m New Technology Telescope. Thanks to the exquisite quality of the Iqueye data, we computed…

High Energy Astrophysical Phenomena · Physics 2014-03-05 L. Zampieri , A. Čadež , C. Barbieri , G. Naletto , M. Calvani , M. Barbieri , E. Verroi , P. Zoccarato , T. Occhipinti

Development and Performance of RFD Crab Cavity Prototypes for HL-LHC AUP

The US will be contributing to the HL-LHC upgrade at CERN with the fabrication and qualification of RFD crabbing cavities in the framework of the HL-LHC Accelerator Upgrade Project (AUP) managed by Fermilab. AUP received Critical Decision 3…

Accelerator Physics · Physics 2023-07-14 L. Ristori , P. Berrutti , M. Narduzzi , J. Delayen , S. de Silva , Z. Li , A. Ratti , N. Huque , A. Castilla

The Crab Nebula Spectrum at ~100 TeV Measured with MAGIC under Very Large Zenith Angles

The Crab Nebula was discovered as the first very-high-energy gamma-ray source by the Whipple Observatory in 1989. Thirty years after its discovery it is still the reference source and the standard candle for Imaging Atmospheric Cherenkov…

Instrumentation and Methods for Astrophysics · Physics 2019-09-13 Michele Peresano , Razmik Mirzoyan , Ievgen Vovk , Petar Temnikov , Darko Zarić , Nikola Godinović , Juliane van Scherpenberg , Jüergen Besenrieder

Operational aspects of the Main Injector large aperture quadrupole (WQB)

A two-year Large Aperture Quadrupole (WQB) Project was completed in the summer of 2006 at Fermilab. Nine WQBs were designed, fabricated and bench-tested by the Technical Division. Seven of them were installed in the Main Injector and the…

Accelerator Physics · Physics 2011-03-18 W. Chou , L. Bartelson , B. Brown , D. Capista , J. Crisp , J. DiMarco , J. Fitzgerald , H. Glass , D. Harding , D. Johnson , V. Kashikhin , I. Kourbanis , P. Prieto , W. Robotham , T. Sager , M. Tartaglia , L. Valerio , R. Webber , M. Wendt , D. Wolff , M. Yang