Beam energy determination in experiments at electron-positron colliders

Ачасов, М. Н.; Muchnoi, N. Yu.

doi:10.1088/1748-0221/9/06/c06011

Cited by 3 publications

(3 citation statements)

References 20 publications

(39 reference statements)

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“…to 10 32 cm −2 s −1 at the maximum center-of-mass energy √ s = 2 GeV. One of the features is the Compton backscattering method [6][7][8] to precisely measure the beam energy. The current integrated luminosity accumulated by the CMD-3 is about 60 pb −1 .…”

Section: Jinst 12 C08010mentioning

confidence: 99%

Geometric alignment of the CMD-3 endcap electromagnetic calorimeter using events of two-quantum annihilation

Akhmetshin¹,

Grigoriev²,

Казанин³

et al. 2017

J. Inst.

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Since 2010 the electromagnetic endcap calorimeter based on BGO crystals is used in experiments as one of the systems of the CMD-3 detector. The spacial resolution is one of crucial parameters of the calorimeter. Inaccurate knowledge of the real calorimeter position can limit the resolution. In this work the alignment of the center of the calorimeter with respect to the tracking system of the CMD-3 detector has been performed using events of two-quantum annihilation. The alignment technique that has been used to determine the position of the calorimeter is described. Finally, the improvement in spacial resolution of the calorimeter after applying the correction for the real calorimeter position is shown.

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Section: Jinst 12 C08010mentioning

confidence: 99%

Geometric alignment of the CMD-3 endcap electromagnetic calorimeter using events of two-quantum annihilation

Akhmetshin¹,

Grigoriev²,

Казанин³

et al. 2017

J. Inst.

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show abstract

“…The unit is mounted to the support (figure 7) and can be turned by bending the flexible bellows through screwing of four bolts, so the angle between the mirror and the laser beam can be adjusted as 2015 JINST 10 T09001 needed with accuracy of 1 mrad. Actually, after installation of the laser-to-vacuum insertion system the mirror is adjusted only once and fixed in this position [1]. The precise vertical and horizontal angular alignment of the laser beam during experiment is done by the special mirrors of the optical system mounted at the step motors.…”

Section: Copper Mirrormentioning

confidence: 99%

“…In experiments at e + e − colliders the high accuracy determination of the beam energy is crucial for a lot of studies. The beam energy below 2 GeV can be precisely measured with the calorimetric method based on Compton backscattering of monochromatic CO 2 (CO) laser radiation on the beam (CBS method) [1].…”

Section: Introductionmentioning

confidence: 99%