Study of radiation background at the north crossing point of the BEPC II in collision mode

莫晓虎,; 张建勇,; 张清江,; Mikhail, Achasov; Cai, Xuhui; 傅成栋,; Fred, Harris; 刘倩,; Muchnoi, N. Yu.; Qin, Qing; 屈化民,; 王贻芳,; 徐金强,; 张天保,

doi:10.1088/1674-1137/35/7/009

Cited by 6 publications

(4 citation statements)

References 11 publications

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Section: Alternating Moving Shieldingmentioning

confidence: 99%

“…Since the HPGe detector is located near the beam pipes of the collider, the radiation background due to beam loss is extremely high [25,26]. In order to protect the HPGe detector from radiation damage, a special design of radiation protect is indispensable [25]. In actual running periods, the detector is surrounded by 5 cm of lead on all the sides, by 1.5 cm of iron below, and by 5 cm of lead above.…”

Section: Alternating Moving Shieldingmentioning

confidence: 99%

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Upgrade of beam energy measurement system at BEPC-II

Zhang

Cai

et al. 2016

Chinese Phys. C

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The beam energy measurement system is of great importance and profit for both BEPC-II accelerator and BES-III detector. The system is based on measuring the energies of Compton back-scattered photons. Many advanced techniques and precise instruments are employed to realize the highly accurate measurement of positron/electron beam energy. During five year's running period, in order to meet the requirement of data taking and improve the capacity of measurement itself, the upgradation of system is continued, which involve the component reformation of laser and optics subsystem, replacement of view-port of the laser to vacuum insertion subsystem, the purchase of electric cooling system for high purity germanium detector, and the improvement of data acquisition and processing subsystem. The upgrading of system guarantees the smooth and efficient measuring of beam energy at BEPC-II and accommodates the accurate offline energy values for further physics analysis at BES-III.

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Section: Alternating Moving Shieldingmentioning

confidence: 99%

Section: Alternating Moving Shieldingmentioning

confidence: 99%

Upgrade of beam energy measurement system at BEPC-II

Zhang

Cai

et al. 2016

Chinese Phys. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since the HPGe detector is located near the beam pipes of collider, radiation background due to beam loss is extremely high [24] [25]. In order to protect the HPGe detector from radiation damage, a special design of radiation protect is indispensable [24].…”

Section: Alternating Moving Shieldingmentioning

confidence: 99%

Improvement of Beam Energy Measurement System for BES-III

Zhang¹,

Cai²,

Mochizuki³

et al. 2016

WJNST

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The beam energy measurement system is significant and profit for both BES-III detector and BEPC-II accelerator. The detection of the high energy scattering photons is realized by virtue of the Compton backscattering principle. Many advanced techniques and precise instruments are employed to acquire the highly accurate measurement of positron/electron beam energy. During five years' running period, in order to satisfy the requirement of data taking and enhance the capacity of measurement itself, the upgradation of system is continued, which involves the components reformation of laser and optics subsystem, replacement of view-port of the laser to vacuum insertion subsystem, the usage of electric cooling system for high purity germanium detector, and the refinement of data acquisition and processing subsystem. The upgrading of system guarantees the smooth and effective measuring of beam energy at BEPC-II and accommodates the accurate offline energy values for further physics analysis at BES-III.

show abstract

“…Our HPGe detector locates in the storage tunnel of BEPCII, where the radiation dose is fairly high [9] [10], especially the neutrons yield serious damages on HPGe detector. The resolution of germanium detector deteriorates continuously during data taking.…”

Section: Introductionmentioning

confidence: 99%