PhotonScience

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2019-12-16
17:27
OpenAccess [PUBDB-2019-05315] Contribution to a conference proceedings
et al
Timing Stability Comparison Study of RF Synthesis Techniques
39th Free Electron Laser Conference, FEL19, HamburgHamburg, Germany, 26 Aug 2019 - 30 Aug 20192019-08-262019-08-30 JACoW Publishing, Geneva, Switzerland 325-327 () [10.18429/JACOW-FEL2019-WEP004]  GO
High-precision and low-noise timing transfer from a master clock to different end stations of a free-electron laser (FEL) is an essential task.[1] Timing precisions ranging from few tens of femtoseconds to sub-femtoseconds are required for seeded FELs and attosecond science centers. Mode-locked lasers referenced to RF standards are commonly used as master oscillators, due to their superior stability and timing precision, depicting timing jitter in the attosecond range.[2] In this matter, one of the biggest challenges is to transfer the timing stability of mode-locked lasers to RF sources. [...]
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2019-02-23
16:18
[PUBDB-2019-01224] Journal Article
et al
Lithium/Oxygen Incorporation and Microstructural Evolution during Synthesis of Li-Rich Layered $\mathrm{Li[Li_{0.2}Ni_{0.2}Mn_{0.6}]O_{2}}$ Oxides
As promising cathode materials, the lithium‐excess 3d‐transition‐metal layered oxides can deliver much higher capacities (>250 mAh g$^{−1}$ at 0.1 C) than the current commercial layered oxide materials (≈180 mAh g$^{−1}$ at 0.1 C) used in lithium ion batteries. Unfortunately, the original formation mechanism of these layered oxides during synthesis is not completely elucidated, that is, how is lithium and oxygen inserted into the matrix structure of the precursor during lithiation reaction? Here, a promising and practical method, a coprecipitation route followed by a microwave heating process, for controllable synthesis of cobalt‐free lithium‐excess layered compounds is reported. [...]
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2018-11-07
16:09
[PUBDB-2018-04296] Book/Report/Internal Report

Concept of the beam exit and entrance windows for the TESLA water based beam dumps and its related beam lines
[TESLA Report 2001-07]
TESLA Reports 14 pp. ()
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2018-11-07
16:06
[PUBDB-2018-04295] Book/Report/Internal Report
et al
Concept of the emergency extraction kicker system for TESLA
[TESLA Report 2001-06]
TESLA Reports 8 pp. ()
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2018-11-07
16:04
[PUBDB-2018-04294] Report/Internal Report
et al
Concept of the fast beam sweeping system for the e+- beam dumps of TESLA
[TESLA Report 2001-05]
5 pp. ()
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2018-11-07
15:59
[PUBDB-2018-04293] Book/Report/Internal Report
et al
Concept of the high power e+- beam dumps for TESLA
[TESLA Report 2001-04]
TESLA Reports 20 pp. ()
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2018-11-06
12:26
[PUBDB-2018-04180] Book/Report/Internal Report
et al
Test measurements of a new TESLA cavity beam position monitor at the ELBE Linac
[TESLA Report 2004-14]
TESLA Reports 14 pp. ()
A new type of a cavity BPM proposed for beam position determination along the TESLA linac was tested at the accelerator ELBE in Rossendorf/ Dresden. Measurements using animproved BPM (large and stable cross-talk isolation, significantly less energy dissipation, a novel LO signal generation) were performed in single- and multi-bunch regimes. [...]
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2018-11-01
10:44
OpenAccess [PUBDB-2018-04084] Book/Report/Internal Report

Design of a Beam Dump for the TTF-FEL Phase II (TTF2) Project: The modification of the existing TESLA Test Facility dump
[TESLA-FEL 1999-06]
TESLA-FEL Reports 19 pp. () [10.3204/PUBDB-2018-04084]  GO
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