Cascaded particle accelerators reach new energy

Compact linear collider (CLIC) is a study for a future electron–positron collider that would allow physicists to explore a new energy region beyond the capabilities of today's particle accelerators. The demanding transverse and vertical beam sizes and emittance specifications are resulting in stringent alignment and a nanometre stability requirement. In the current feasibility study, the main beam quadrupole magnets have to be actively pre-aligned with a precision of 1 µm in five degrees of freedom before being mechanically stabilized to the nanometre scale above 1 Hz. This contribution describes the approach of performing this active pre-alignment based on an eccentric cam system. In order to limit the amplification of the vibration sources at resonant frequencies, a sufficiently high eigenfrequency is required. Therefore, the contact region between cam and support was optimized for adequate stiffness based on the Hertzian theory. Furthermore, practical tests performed on a single-degree-of-freedom mockup will show the limitation factors and further improvements required for successful integration in a full-scale quadrupole mockup presently under design.

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Specimen Preparation of Near Surface Ion Irradiated Samples

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100117820 ◽

1985 ◽

Vol 43 ◽

pp. 170-171

Author(s):

K. F. Russell ◽

L. L. Horton

Keyword(s):

Radiation Damage ◽

Heavy Ions ◽

Target Material ◽

Metal Alloys ◽

Specimen Surface ◽

Specimen Preparation ◽

Particle Accelerators ◽

Near Surface ◽

Graaff Accelerator ◽

Van De Graaff

Beams of heavy ions from particle accelerators are used to produce radiation damage in metal alloys. The damaged layer extends several microns below the surface of the specimen with the maximum damage and depth dependent upon the energy of the ions, type of ions, and target material. Using 4 MeV heavy ions from a Van de Graaff accelerator causes peak damage approximately 1 μm below the specimen surface. To study this area, it is necessary to remove a thickness of approximately 1 μm of damaged metal from the surface (referred to as “sectioning“) and to electropolish this region to electron transparency from the unirradiated surface (referred to as “backthinning“). We have developed electropolishing techniques to obtain electron transparent regions at any depth below the surface of a standard TEM disk. These techniques may be applied wherever TEM information is needed at a specific subsurface position.

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Plasma-surfing electrons point to compact particle accelerators

AccessScience ◽

10.1036/1097-8542.br1026181 ◽

2018 ◽

Keyword(s):

Particle Accelerators

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Consortia and Curriculum: Synergy and New Energy

PsycEXTRA Dataset ◽

10.1037/e505002006-007 ◽

1997 ◽

Author(s):

Peter Moyers

Keyword(s):

New Energy

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Comparative Study on Development Paths of Sino-German New Energy Buses

CICTP 2019 ◽

10.1061/9780784482292.115 ◽

2019 ◽

Author(s):

Xueran Wang ◽

Mo Zhang ◽

Wenfeng Liu ◽

Chuna Wu

Keyword(s):

Comparative Study ◽

New Energy ◽

Development Paths

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The Application of UX Research in New Energy Vehicle Innovation

Conference Proceedings of the Academy for Design Innovation Management ◽

10.33114/adim.2017.58 ◽

2019 ◽

Vol 1 (1) ◽

Author(s):

Menghan TAO ◽

Ning XIAO ◽

Xingfu ZHAO ◽

Wenbin LIU

Keyword(s):

Early Stage ◽

Rapid Expansion ◽

The Other ◽

Innovative Product ◽

Stage Of Development ◽

New Energy ◽

New Energy Vehicle ◽

The One ◽

New Energy Vehicles ◽

Degree Of Innovation

New energy vehicles(NEV) as a new thing for sustainable development, in China, on the one hand has faced the rapid expansion of the market; the other hand, for the new NEV users, the current NEVs cannot keep up with the degree of innovation. This paper demonstrates the reasons for the existence of this systematic challenge, and puts forward the method of UX research which is different from the traditional petrol vehicles research in the early stage of development, which studies from the user's essence level, to form the innovative product programs which meet the needs of users and being real attractive.

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