[en] A beam transport line has been designed to transport a 30 MeV electron beam from the injector linac to the booster synchrotron for Indus accelerator facility at Raja Ramanna Centre for Advanced Technology. The line has been designed considering the beam optics requirements and constraint of space available in the booster hall. The optics has been chosen in order to keep the beam sizes within acceptable limit in the line. To improve the injection efficiency into the booster synchrotron, the phase space parameters of the beam has been matched at the injection point of the booster synchrotron. In this paper, we discuss the evolution of design of electron beam optics of transport line from the linac injector to the booster synchrotron. (author)

[en] A 25 Hz proton synchrotron of 100 MeV-1 GeV is proposed for the spallation neutron source (SNS) to be developed. A 100 MeV H^- linac will be developed as an injector for this SNS. A preliminary lattice design study is carried out for a beam transfer line from this linac to the SNS. TRANSPORT code has been used to design this line. It has been designed in such a way that minimum loss of particles takes place during the beam transport process

[en] The 20 MeV microtron beam is the first part of injector network for both the storage ring Indus-1 and Indus-2 and is being used for the injection into the booster synchrotron. The beam is mainly characterized by its emittance and the energy spread. In this paper a scheme is proposed for measurement of the beam energy spread. The beam transport line-1 (TL-1) consists of three quadrupole doublets. A branch line just after the 45 degree bending magnet of TL-1 will be used for this measurement. In this paper we describe the optimization of the first quadrupole doublet to achieve the desired condition of lowering the betatron contribution as compared to the dispersive term. (author)

[en] A variable energy electron beam transport line has been designed to transport a 15-25 MeV electron beam from the injector linac to the undulator of a tuneable infra-red free electron laser (IR-FEL) being built at the Raja Ramanna Centre for Advanced Technology ( RRCAT). Beam optics of this transport line, which uses a dog-leg type bend, has been designed to match the twiss parameters of the beam to that of the undulator as per FEL design requirements and keep the beam envelop within acceptable limits through out the transport line. In this paper, we discuss the evolution of design of electron beam optics from the linac to the undulator. (author)

[en] The beam transfer line-3 ( TL-3 ) is used to transfer the 550 MeV electron beam from the booster synchrotron to the Indus-2 storage ring. Optics of this line was re-optimized considering the present locations of the magnets in the TL-3 and the results of the new optics are discussed. Based on the measured dipole and quadrupole field data, a cubic spline fitting method was used to fit the field data and the required driving currents were estimated for proper beam transmission. The final magnet currents are close to the fitted values. In Indus-2 operation, the electron beam is transmitted through this transfer line without any significant beam loss. (author)

No abstract available

[en] A new 20 MeV Microtron has been installed and commissioned in Indus Accelerator Complex. It is important to know the beam energy spread for calculating the beam size blow-up due to dispersion in the line, so that the beam transport line can be optimized such that minimum loss of particles takes place. Beam energy spread also plays an important role during the beam injection in the booster synchrotron. Electrons having energy deviation larger than the energy acceptance of the booster are lost during injection process and causing excessive radiation in the booster hall. In this paper we have presented the method of measurement as well as the measured data of the beam energy spread for the new 20 MeV microtron. (author)

[en] Indus-2, a synchrotron light source facility at RRCAT, Indore is in continuous operation at 2.5 GeV, generating the synchrotron radiation from its bending magnets. For enhancing the intensity of synchrotron radiation, two planar undulators have been installed and successfully commissioned with the Indus-2 electron beam. Various beam dynamical challenges such as beam accumulation, beam energy ramping and storage at 2.5 GeV have been addressed to ensure the smooth commissioning of these devices. Moreover, due to interaction of the stored beam with magnetic field of undulators, various parameters of the electron beam get changed. In this paper, the beam dynamics studies to ensure the smooth commissioning of these devices and its measured effect on beam parameters have been presented. (author)

[en] The exposure of population to high concentrations of radon and it daughters for a long period lead to pathological effects like the respiratory functional changes and the occurrence of lung cancer. In the present study indoor radon monitoring has been carried out in fly ash handling facility and fly ash brick dwellings in village Mitrol of district Faridabad, Haryana (India) using alpha sensitive LR-115 type II solid-state nuclear track detectors. The equilibrium equivalent concentration (EEC) of radon levels in fly ash handling facility varied from 5 to 33 Bq.m^-3 with an average of 15.3 ± 3 Bq.m^-3 and the average inhalation dose estimated in working areas is 0.26 ± 0.04 mSv. The EEC radon concentration levels in fly ash brick dwellings varied from 45 to 74 Bqm^-3 with an average of 56.7 ± 3.4 Bq.m^-3 contributing an average indoor inhalation dose of 2.45 ± 0.15 mSv.y^-1 to the residents. (author)

[en] Measurements of radon are important because the radiation dose to human population due to inhalation of radon and its progeny contribute more than 50% of the total dose from natural sources. In the present study radon monitoring has been carried out in refinery and nearby township at Panipat, Haryana using alpha sensitive LR-115 type II solid-state nuclear track detectors. The Equilibrium equivalent Concentration (EEC) of radon in environment of refinery varied from 19.23 to 105.57 Bq m^-3 with an average of 55.30 ± 5.94 Bq m^-3 while annual effective dose received by the workers varied from 0.33 mSv to 1.81 mSv with an average of 0.89 ± 0.10 mSv. The Equilibrium equivalent Concentration (EEC) of radon in township near refinery varied from 38.36 to 95.95 Bq m^-3 with an average of 61.18 ± 7.02 Bq m^-3 while annual effective dose received by the occupants varied from 1.65 mSv to 4.13 mSv with an average of 2.63 ± 0.30 mSv. (author)