Poster

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2018-06-05
10:41
OpenAccess [PUBDB-2018-02180] Poster

The new Fast Beam Condition Monitor using diamond and silicon sensors for luminosity measurement at CMS
14th Pisa Meeting on Advanced Detectors, ELBA2018, Biodola, ElbaBiodola, Elba, Italy, 27 May 2018 - 2 Jun 20182018-05-272018-06-02  GO
The Fast Beam Condition Monitor (BCM1F) is used in CMS to measure beam induced background and precision luminosity. The system in its current implementation was first installed in 2014, equipped with single-crystalline (sCVD) diamond sensors. [...]
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2018-06-04
14:39
[PUBDB-2018-02177] Poster
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High Ql and High Gradient CW Operation of Tesla SCRF 9-Cell Cavity
IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 5 May 20182018-04-292018-05-05
In the paper we would like to present Tesla SCRF 9-Cell cavity operated at CW regime withextremely high QL at gradients above 23 MV/m. The design hardware and firmware components aswell as developed high level software procedures allows automatic procedure of cavity trip from lowto high gradient operation. [...]

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2018-05-29
16:05
OpenAccess [PUBDB-2018-02138] Poster
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Metal Photocathodes Preparation for Compact Linear Accelerator at Daresbury Laboratory
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
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2018-05-29
15:56
OpenAccess [PUBDB-2018-02137] Poster
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The REGAE Accelerator Vacuum System
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
Since 2011 the Relativistic Electron Gun for Atomic Exploration (REGAE) is operated at DESY in Hamburg. The accelerator consists mainly of a high gradient S-band RF-gun, which generates ultra-low emittance electron bunches, and an S-band RF-buncher cavity for bunch compression. [...]
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2018-05-29
11:22
OpenAccess [PUBDB-2018-02128] Poster
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Cs$_2$Te Photocathode Lifetime at FLASH and European XFEL
The 9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
The photoinjectors of FLASH and the European XFEL at DESY (Hamburg, Germany) use Cs$_2$ Te photocathodes. In this contribution we give an update on the lifetime and quantum efficiency of the cathodes operated in both facilities [...]
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2018-05-24
10:15
[PUBDB-2018-02086] Poster
; ; ; et al
An Option to Generate Seeded FEL Radiation for FLASH1
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04
The FLASH free-electron laser (FEL) at DESY is currently operated in self-amplified spontaneous emission (SASE) mode in both beamlines FLASH1 and FLASH2. Seeding offers unique properties for the FEL pulse, such as full coherence, spectral and temporal stability. [...]

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2018-05-24
10:08
OpenAccess [PUBDB-2018-02084] Poster
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Control of FEL Radiation by Tailoring the Seed Pulses
9th International Particle Accelerator Conference (IPAC'18), IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
Seeded free-electron lasers (FELs) produce intense, ultrashort and fully coherent X-ray pulses. These seeded FEL pulses depend on the initial seed properties. [...]
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2018-05-23
13:06
[PUBDB-2018-02057] Poster
; ; ; et al
Microwave instability and energy spread measurement via vertical dispersion bump in PETRA III
9th International Particle Accelerator Conference, IPAC’18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04
The recent measurement of bunch length versus current indicated that the longitudinal impedance (Z/n) is 0.15 Ohm in close agreement with the impedance model [1]. Naïve application of Keil-Schnell criteria predicts that the threshold of microwave instability at 0.25 mA. [...]

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2018-05-18
23:22
OpenAccess [PUBDB-2018-02012] Poster
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A PETRA IV Lattice Based on Hybrid Seven Bend Achromats
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
For the PETRA IV project at DESY it is planned to convert the 6 GeV synchrotron light source PETRA III into a diffraction limited storage ring with ultra-low emittances. PETRA IV should provide a natural emittance two orders of magnitude smaller as now. [...]
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2018-05-18
22:48
OpenAccess [PUBDB-2018-02008] Poster
; ; ; et al
Optimization of the Injection Kicker Bump Leakage at PETRA III
9th International Particle Accelerator Conference, IPAC'18, VancouverVancouver, Canada, 29 Apr 2018 - 4 May 20182018-04-292018-05-04  GO
PETRA III is a third generation synchrotron light source at DESY delivering high brightness photon beams for users at 21 beam lines. It is operated at 6 GeV with a beam current of 100 mA in top-up mode and is in operation for users since 2010. [...]
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