Irradiated seeds of Phaseolus vulgaris cv. Rajmah using Synchroton X-Ray Beam (BL-07) at RRCAT, Indore at various doses in the range of 0.5 - 10 Gy were used to raise the seedling and the growth status at different st...Irradiated seeds of Phaseolus vulgaris cv. Rajmah using Synchroton X-Ray Beam (BL-07) at RRCAT, Indore at various doses in the range of 0.5 - 10 Gy were used to raise the seedling and the growth status at different stages was evaluated. Prior to germination, in the seeds soaked for 24 hours, the water regain remained unaffected by seed irradiation at 1 - 10 Gy doses, while the acid phosphatase activity was significantly reduced. Strong correlation (R2 = 0.685) between irradiation dose and enzyme activity also resulted. Analysing seed irradiation effect on seed development up to 4 days, % germination, germination index (GI), seedling wt, and seedling vigour were non significantly decreased at 5.0 Gy dose. The overall growth of 10 days old seedlings raised from irradiated seeds was substantially reduced at irradiation doses of 2?and 5 Gy exerting strong -ve correlation. Also % germination and seed vigour index (SVI) were prominently decreased due to seed irradiation. The nitrogen status of the seedlings, reflected by nitrate reductase activity (NRA) was significantly reduced in response to irradiation exerting strong correlation. The results demonstrate decreased phosphate mobilization in soaked seeds, time dependent decreased growth being more substantial with longer duration and reduced nitrate assimilation due to seed irradiation with Synchroton X-Ray Beam.展开更多
Considerable effort has been devoted to the development of superconducting undulators(SCUs)intended for particle accelerator‐based light sources,including synchrotrons and free electron laser(FEL)facilities.Recently,...Considerable effort has been devoted to the development of superconducting undulators(SCUs)intended for particle accelerator‐based light sources,including synchrotrons and free electron laser(FEL)facilities.Recently,a high‐temperature superconducting(HTS)undulator prototype,consisting of staggered‐array Re-Ba‐Cu-O bulks,achieved an on‐axis sinusoidal magnetic field profile with a peak amplitude B_(0)of 2.1 T and a period length of 10 mm,resulting in a deflection parameter K=1.96.Such a short period HTS undulator not only enables the generation of higher‐energy photons,but also supports the construction of economically feasible and compact FELs with shorter linear accelerators(LINACs).This article provides a comprehensive review of recent advances in the staggered‐array bulk HTS undulator as well as other types of HTS undulators.Furthermore,it offers insights into the development of engineering HTS undulator prototypes designed for deployment in synchrotron and free electron laser(FEL)facilities.We conclude by discussing opportunities for and the challenges facing the use of HTS undulators in practical applications.展开更多
文摘Irradiated seeds of Phaseolus vulgaris cv. Rajmah using Synchroton X-Ray Beam (BL-07) at RRCAT, Indore at various doses in the range of 0.5 - 10 Gy were used to raise the seedling and the growth status at different stages was evaluated. Prior to germination, in the seeds soaked for 24 hours, the water regain remained unaffected by seed irradiation at 1 - 10 Gy doses, while the acid phosphatase activity was significantly reduced. Strong correlation (R2 = 0.685) between irradiation dose and enzyme activity also resulted. Analysing seed irradiation effect on seed development up to 4 days, % germination, germination index (GI), seedling wt, and seedling vigour were non significantly decreased at 5.0 Gy dose. The overall growth of 10 days old seedlings raised from irradiated seeds was substantially reduced at irradiation doses of 2?and 5 Gy exerting strong -ve correlation. Also % germination and seed vigour index (SVI) were prominently decreased due to seed irradiation. The nitrogen status of the seedlings, reflected by nitrate reductase activity (NRA) was significantly reduced in response to irradiation exerting strong correlation. The results demonstrate decreased phosphate mobilization in soaked seeds, time dependent decreased growth being more substantial with longer duration and reduced nitrate assimilation due to seed irradiation with Synchroton X-Ray Beam.
基金supported by the Chinese National Overseas Yang Talent program,the Swiss Accelerator Research and Technology(CHART)program and the European Union’s Horizon 2020 research and innovation program under grant agreement no.101004728(LEAPS‐INNOV)This work has been partially funded by Swiss LOS Lottery Fund of Kanton AargauThis work has been authored by Fermi Research Alliance,LLC under Contract No.DE‐AC02‐07CH11359 with the U.S.Department of Energy,Office of Science,Office of High Energy Physics.
文摘Considerable effort has been devoted to the development of superconducting undulators(SCUs)intended for particle accelerator‐based light sources,including synchrotrons and free electron laser(FEL)facilities.Recently,a high‐temperature superconducting(HTS)undulator prototype,consisting of staggered‐array Re-Ba‐Cu-O bulks,achieved an on‐axis sinusoidal magnetic field profile with a peak amplitude B_(0)of 2.1 T and a period length of 10 mm,resulting in a deflection parameter K=1.96.Such a short period HTS undulator not only enables the generation of higher‐energy photons,but also supports the construction of economically feasible and compact FELs with shorter linear accelerators(LINACs).This article provides a comprehensive review of recent advances in the staggered‐array bulk HTS undulator as well as other types of HTS undulators.Furthermore,it offers insights into the development of engineering HTS undulator prototypes designed for deployment in synchrotron and free electron laser(FEL)facilities.We conclude by discussing opportunities for and the challenges facing the use of HTS undulators in practical applications.
