Design study and modeling of multi-beam Klystron for Circular Electron Positron Collider

To obtain high luminosity, compact high gradient quadrupole magnets QD0 and QF1 are required on both sides of the interaction points of the proposed Circular Electron Positron Collider (CEPC). QD0 is a double aperture superconducting quadrupole closest to the interaction point with a crossing angle between two aperture centerlines of 33 mrad. Magnetic field crosstalk between two apertures of QD0 is negligible using iron yoke, and the 3D coil end is optimized by ROXIE. In the design study, both NbTi conductor and HTS conductor are taken into account. The first step of the R&D is to design and manufacture a QD0 short model magnet with a magnetic length of 0.5 m. In this paper, the R&D status of QD0 short model magnet is described, and the design study of quadrupole magnet including NbTi technology and HTS Bi-2212 technology is presented.

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Proton-Electron-Positron Design Study

IEEE Transactions on Nuclear Science ◽

10.1109/tns.1973.4327321 ◽

1973 ◽

Vol 20 (3) ◽

pp. 1039-1044

Author(s):

Tom Elioff ◽

M. Allen ◽

R. Avery ◽

J. Augustin ◽

R. Bangerter ◽

...

Keyword(s):

Design Study ◽

Electron Positron

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Dual-readout calorimetry: Present status and perspective

International Journal of Modern Physics A ◽

10.1142/s0217751x21420173 ◽

2021 ◽

pp. 2142017

Author(s):

Massimiliano Antonello ◽

Massimo Caccia ◽

Romualdo Santoro ◽

Roberto Ferrari ◽

Gabriella Gaudio ◽

...

Keyword(s):

Mass Production ◽

Present Status ◽

Design Study ◽

Technology Design ◽

Novel Technique ◽

Electron Positron ◽

Expected Performance ◽

Effective Cost ◽

Under Construction ◽

Full Simulation

Dual-readout calorimetry is now a mature and well-known technology which guarantees excellent electromagnetic and hadronic resolution in the same detector. It has recently being proposed in the framework of IDEA (Innovative Detector for Electron–Positron Accelerators) for both Future Circular Collider (FCC-ee) and Circular Electron–Positron Collider (CEPC). After being extensively tested on prototypes, the dual-readout calorimetry is now moving toward a technology design study in order to be realistically available for an experiment. In this context, a full simulation of the calorimeter has been developed and used to estimate the expected performance of the detector. At the same time, the development of a novel technique for mass production of the detector modules, at an effective cost, is ongoing. As a first step, an electromagnetic-size prototype is under construction for a testbeam data taking originally foreseen in November 2020 and now moved to spring 2021, due to the Covid-19 pandemic spread.

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