Analysis and correction of linear optics errors, and operational improvements in the Indus-2 storage ring

Riyasat Husain; A. D. Ghodke

doi:10.1088/1674-1137/41/8/087002

Chinese Physics C> 2017, Vol. 41> Issue(8) : 087002 DOI: 10.1088/1674-1137/41/8/087002

Analysis and correction of linear optics errors, and operational improvements in the Indus-2 storage ring

Riyasat Husain ^1,2,, ,
A. D. Ghodke ¹

1.
Accelerator Physics Section, Raja Ramanna Centre for Advanced Technology, Indore, 452013, India
2.
Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400 094, India
3.
Accelerator Physics Section, Raja Ramanna Centre for Advanced Technology, Indore, 452013, India

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Abstract：
Estimation and correction of the optics errors in an operational storage ring is always vital to achieve the design performance. To achieve this task, the most suitable and widely used technique, called linear optics from closed orbit (LOCO) is used in almost all storage ring based synchrotron radiation sources. In this technique, based on the response matrix fit, errors in the quadrupole strengths, beam position monitor (BPM) gains, orbit corrector calibration factors etc. can be obtained. For correction of the optics, suitable changes in the quadrupole strengths can be applied through the driving currents of the quadrupole power supplies to achieve the desired optics. The LOCO code has been used at the Indus-2 storage ring for the first time. The estimation of linear beam optics errors and their correction to minimize the distortion of linear beam dynamical parameters by using the installed number of quadrupole power supplies is discussed. After the optics correction, the performance of the storage ring is improved in terms of better beam injection/accumulation, reduced beam loss during energy ramping, and improvement in beam lifetime. It is also useful in controlling the leakage in the orbit bump required for machine studies or for commissioning of new beamlines.
- LOCO code ,
- beta-beat ,
- betatron coupling ,
- beam lifetime ,
- Indus-2 storage ring

References

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Riyasat Husain and A. D. Ghodke. Analysis and correction of linear optics errors, and operational improvements in the Indus-2 storage ring[J]. Chinese Physics C, 2017, 41(8): 087002. doi: 10.1088/1674-1137/41/8/087002

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Received: 2016-12-15
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沈阳化工大学材料科学与工程学院沈阳 110142

Analysis and correction of linear optics errors, and operational improvements in the Indus-2 storage ring

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Analysis and correction of linear optics errors, and operational improvements in the Indus-2 storage ring

Corresponding author: Riyasat Husain, riyasat@rrcat.gov.in

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