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1. Prediction of strain, inter-layer interaction and critical current in CORC® wires under axial strain by T-A modeling

Author

K Wang, Y W Gao, V A Anvar, K Radcliff, J D Weiss, D C van der Laan, Y H Zhou, A Nijhuis, and Energy, Materials and Systems

Subjects
critical current reduction, inter-layer interaction, Materials Chemistry, Metals and Alloys, Ceramics and Composites, T-A method, axial tensile load, Electrical and Electronic Engineering, CORC®, Condensed Matter Physics, HTS cable, 22/4 OA procedure
Abstract

Superconducting conductors on round core (CORC®) cables and wires can meet the needs of large high-field magnets, such as particle accelerators and compact nuclear fusion machines, due to their simple cabling process, high current-carrying capacity and reliable operation under high mechanical stresses. Many high-field magnets require CORC® cables to carry a current of thousands of amperes in a background magnetic field exceeding 20 T. As a result, the large electromagnetic forces will deform the cable in the axial direction due to hoop stress and in the transverse direction by compressive stress. Therefore, it is essential to determine the irreversible deformation limit of the CORC® cable under axial tensile load and optimize the cabling parameters to potentially extend this limit. Analytical and numerical methods are developed to assess the performance degradation of CORC® wires under axial tensile load. The strain level, interlayer contact pressure and friction and their impact on the critical current are calculated by combining the mechanical response and the T-A method. Analyzing the results shows that the winding angle of the tape and the Poisson’s ratio of the inner core are key factors affecting the irreversible tensile strain limit of CORC® wires. The smaller the winding angle and the higher the Poisson’s ratio of the inner core, the higher the irreversible tensile strain limit. For multi-layer CORC® wires, the initial contact pressure caused by the cabling process must also be considered. The inter-layer interaction is coupled with the tape strain of each layer. The results of this research can serve as a basis for optimizing and designing CORC® wires with extended irreversible strain limits.

Published
2022
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2. Kerala Bird Atlas 2015–20: features, outcomes and implications of a citizen-science project

Author

Praveen, J., primary, Nameer, P. O., additional, Jha, Ashish, additional, Aravind, Anish, additional, Dilip, K. G., additional, Karuthedathu, Dipu, additional, Tom, George, additional, Mavelikara, Hari, additional, Mannar, Harikumar, additional, Palot, Jafer, additional, Johnson, Jaichand, additional, Jishnu, R., additional, Rodrigues, K. Maxim, additional, Mujeeb, P. M., additional, Namassivayan, L., additional, Payyeri, Naveelal, additional, Nesrudheen, P. P., additional, Narayanan, S. Prasanth, additional, Prasanth, S. S., additional, Krishna, M. C. Prashantha, additional, Praveen, E. S., additional, Velayudhan, Praveen, additional, Reghuvaran, Premchand, additional, Kidoor, Raju, additional, Rathish, R. L., additional, Roshnath, R., additional, Sashikumar, C., additional, Meppayur, Satyan, additional, Sivakumar, A. K., additional, Sreedevi, A. K., additional, Sreekumar, B., additional, Sreekumar, E. R., additional, Sumesh, P. B., additional, Venugopal, R., additional, Venugopal, Vinod, additional, Vishnudas, C. K., additional, Kartha, Vishnupriyan, additional, Puliyeri, Vivek, additional, Quader, Suhel, additional, Reddy, Abinand, additional, Puthiyeri, Abdul Raheem, additional, Riyas, K. Abdul, additional, Abhijith, R. S., additional, Surendran, Abhijith, additional, Sunil, Abhin M., additional, Chandran, Abhinand, additional, Abhirami, C., additional, Jayakumar, Abhirami M., additional, Peter, Abhishek Sebastian, additional, Muhammed, N. V. Afreed, additional, Katakath, Afthab Faisal, additional, Ajai, P., additional, Raju, Aju K., additional, Akhil, P. M., additional, Akhil, U. S., additional, Amal, U. S., additional, Menon, Anamika, additional, Ansari, Anas Ibinu, additional, Aneesh, K. S., additional, Aneesh, S., additional, Hari, C. Anjana, additional, Anjitha, R., additional, Raj, P. N. Anoop, additional, John, Anu, additional, Varma, Anuradha, additional, Anushreedha, S. S., additional, Aravind, C. K., additional, Ramachandran, Arjun, additional, Arun, B., additional, George, Arun, additional, Gopi, Arun P., additional, Varghese, Arun, additional, Vinod, Arya, additional, Shaji, Ashley, additional, Raj, V. M. Ashok, additional, Viswanathan, Ashwin, additional, Mohammed, Aslam, additional, Aswin, A., additional, Aswin, K. S., additional, Ali, A. Azhar, additional, Balaji, P. B., additional, Paul, M. Bibin, additional, Shree, J. Chaithra, additional, Venkatraman, Chandrasekaran, additional, Charutha, K., additional, Jose, Clareena T., additional, Jose, Clince P., additional, Singh, Dalip, additional, Sanghamithra, Devika, additional, Sikarwar, Digvijay Singh, additional, Murukesh, Divin, additional, Divin, V., additional, Arief, Fauzia, additional, Mandal, Jaydev, additional, Sarlin, P. J., additional, Nafar, A. Adil, additional, Bachan, K. H. Amitha, additional, Rejitha, V., additional, Dev, R. S. Vishnu, additional, Rowther, B. Elias, additional, Raja, Firosh, additional, Iyer, Geetha, additional, George, Ginu, additional, Gireesan, T. U., additional, Mohan, P. K. Girish, additional, Dsouza, Glen Preetesh, additional, Govind, G., additional, Greeshma, P., additional, Prasad, P. M. Hari, additional, Hariharan, T. V., additional, Harith, A., additional, Harith, C., additional, Hemanth, B., additional, Mohamed, Ijaas, additional, David, J. Patrick, additional, Jain, P. K., additional, Jameela, P., additional, Jayakrishnan, G., additional, Jishnu, K., additional, Jismi, M. O., additional, Johnson, Jithin, additional, Soniya, C. Joel, additional, Babu, Jose Rani, additional, Roy, Joseph, additional, Nelson, Jyothish, additional, Krishnan, M. Jyothi, additional, Bhandary, K. Pranav, additional, Jamaludheen, K. M., additional, Ravi, Kavingal, additional, Thrikkadeeri, Karthik, additional, Nair, Kausthubh K., additional, Kiran, B. S., additional, Kumar, Kiran S., additional, Raj, D. Kishore, additional, Panaganti, Kishore Kumar, additional, Moorthy, M. Krishna, additional, Murthy, R. Krishna, additional, Krishnanunni, M. R., additional, Prabhakaran, Latha, additional, Lathika, K. K., additional, Abraham, Libin, additional, Narayanan, G. Hari, additional, Panigrahi, Madhumita, additional, Manav, S., additional, Karingamadathil, Manoj, additional, Manoj, T. R., additional, Thomas, Manu, additional, Manuel, P. P., additional, Varghese, Mebin George, additional, Chandran, P. Megha, additional, Sulaiman, M. Mohammad, additional, Madathil, Mohammed Ashif, additional, Hirash, V. K. Mohammed, additional, Ramees, K. Mohammed, additional, Thirunnavaya, M. Sadique, additional, Niyas, A. P. Muhammed, additional, Muhasin, C. T., additional, Kizhakkemadham, Mukundan, additional, Azeez, Naseerudheen Abdul, additional, Nikhil, P. V., additional, Niranjana, C., additional, Mundekad, Nisha, additional, Mohan, Nithin, additional, Pavithra, A., additional, Viswanathan, Poornima, additional, Pramod, P., additional, Prakash, G., additional, Prasath, S., additional, Prakash, Prasoon, additional, Preethi, N., additional, Rajeevan, Rahul, additional, Rajaguru, M., additional, Rajarajan, V., additional, Sankaran, Raju, additional, Ratheesh, K., additional, Crasta, Rayan Pradeep, additional, Mohan, Remya, additional, Renju, Anon, additional, Koshy, Robin C., additional, Rai, Rohan, additional, Tom, Roshin, additional, Chandran, Sachin, additional, Sachinkrishna, M. V., additional, Ali, M. V. Saeed Anvar, additional, Siril, Sajitha, additional, Bharadwaj, D. D. Samarth, additional, George, Samuel, additional, Morris, Sancia, additional, Augustine, Sandeep, additional, Das, Sandeep K., additional, Morris, Sandie, additional, Sandra, P. R., additional, Sanuraj, T. K., additional, Sawant, Saurabh, additional, Morris, Savio, additional, Selvaganesh, K., additional, Shahil, K., additional, Shahina, N. N., additional, Valasy, Shahul, additional, Siji, P. K., additional, Joseph, Siju, additional, Sivashankar, R., additional, Karim, Siyad A., additional, Mohan, Sreehari K., additional, Pillai, Sreehari M., additional, Sowmiya, M. Sri, additional, Srinila, K. T., additional, Subin, K. S., additional, Sujith, V. G., additional, Sukumaran, Suryamol, additional, Syamili, M. S., additional, Menon, Tarun, additional, Praveen, Tejas, additional, Thilak, S. A., additional, Antony, Tony, additional, Ullas, U. R, additional, Sivaji, Vinod Ooralath, additional, Narayanan, Vishnu, additional, Sreejith, M. Vishnu, additional, Chandran, A. Vivek, additional, Sudhakaran, Vivek, additional, Vridhi, R., additional, Humam, Wahiba Irshad, additional, Uchummal, Yadukrishna J., additional, and Yathumon, M. A., additional

Published
2022
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3. Enhanced critical axial tensile strain limit of CORC® wires: FEM and analytical modeling

Author

V A Anvar, K Wang, J D Weiss, K Radcliff, D C van der Laan, M S A Hossain, and A Nijhuis

Subjects
Materials Chemistry, Metals and Alloys, Ceramics and Composites, Electrical and Electronic Engineering, Condensed Matter Physics
Abstract

Conductor on Round Core (CORC®) cables and wires are composed of spiraled high-temperature superconducting (HTS) rare-earth barium copper oxide (REBCO) tapes, wound in multiple layers, and can carry very high currents in background magnetic fields of more than 20 T. They combine isotropic flexibility and high resilience to electromagnetic and thermal loads. The brittle nature of HTS tapes limits the maximum allowable axial tensile strain in superconducting cables. An intrinsic tensile strain above about 0.45% will introduce cracks in the REBCO layer of straight HTS tapes resulting in irreversible damage. The helical fashion at which the REBCO tapes are wound around the central core allows tapes to experience only a fraction of the total axial tensile strain applied to the CORC® wire. As a result, the critical strain limit of CORC® wires can be increased by a factor of more than 10 that of REBCO tapes. Finite element (FE) and analytical models are developed to predict the performance of CORC® wires under axial tensile strain. A parametric analysis is carried out by varying the winding angle, the Poisson’s ratio of the CORC® wire core, the core diameter, and the tape width. The results show that a small variation in winding angle can have a significant impact on the cable’s axial tensile strain tolerance. While the radial contraction of the helically wound tapes in a CORC® wire under axial tensile strain depends on its winding angle, it is mostly driven by the Poisson’s ratio of the central core, affecting the tape strain state and thus its performance. Contact pressure from multiple layers within the CORC® wire also affects the CORC® wire performance. The FE model can be used to optimize the cable design for specific application conditions, resulting in an irreversible strain limit of CORC® cables and wires as high as 7%.

Published
2022
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4. Kerala Bird Atlas 2015–20: features, outcomes and implications of a citizen-science project

Author

J. Praveen, P. O. Nameer, Ashish Jha, Anish Aravind, K. G. Dilip, Dipu Karuthedathu, George Tom, Hari Mavelikara, Harikumar Mannar, Jafer Palot, Jaichand Johnson, R. Jishnu, K. Maxim Rodrigues, P. M. Mujeeb, L. Namassivayan, Naveelal Payyeri, P. P. Nesrudheen, S. Prasanth Narayanan, S. S. Prasanth, M. C. Prashantha Krishna, E. S. Praveen, Praveen Velayudhan, Premchand Reghuvaran, Raju Kidoor, R. L. Rathish, R. Roshnath, C. Sashikumar, Satyan Meppayur, A. K. Sivakumar, A. K. Sreedevi, B. Sreekumar, E. R. Sreekumar, P. B. Sumesh, R. Venugopal, Vinod Venugopal, C. K. Vishnudas, Vishnupriyan Kartha, Vivek Puliyeri, Suhel Quader, Abinand Reddy, Abdul Raheem Puthiyeri, K. Abdul Riyas, R. S. Abhijith, Abhijith Surendran, Abhin M. Sunil, Abhinand Chandran, C. Abhirami, Abhirami M. Jayakumar, Abhishek Sebastian Peter, N. V. Afreed Muhammed, Afthab Faisal Katakath, P. Ajai, Aju K. Raju, P. M. Akhil, U. S. Akhil, U. S. Amal, Anamika Menon, Anas Ibinu Ansari, K. S. Aneesh, S. Aneesh, C. Anjana Hari, R. Anjitha, P. N. Anoop Raj, Anu John, Anuradha Varma, S. S. Anushreedha, C. K. Aravind, Arjun Ramachandran, B. Arun, Arun George, Arun P. Gopi, Arun Varghese, Arya Vinod, Ashley Shaji, V. M. Ashok Raj, Ashwin Viswanathan, Aslam Mohammed, A. Aswin, K. S. Aswin, A. Azhar Ali, P. B. Balaji, M. Bibin Paul, J. Chaithra Shree, Chandrasekaran Venkatraman, K. Charutha, Clareena T. Jose, Clince P. Jose, Dalip Singh, Devika Sanghamithra, Digvijay Singh Sikarwar, Divin Murukesh, V. Divin, Fauzia Arief, Jaydev Mandal, P. J. Sarlin, A. Adil Nafar, K. H. Amitha Bachan, V. Rejitha, R. S. Vishnu Dev, B. Elias Rowther, Firosh Raja, Geetha Iyer, Ginu George, T. U. Gireesan, P. K. Girish Mohan, Glen Preetesh Dsouza, G. Govind, P. Greeshma, P. M. Hari Prasad, T. V. Hariharan, A. Harith, C. Harith, B. Hemanth, Ijaas Mohamed, J. Patrick David, P. K. Jain, P. Jameela, G. Jayakrishnan, K. Jishnu, M. O. Jismi, Jithin Johnson, C. Joel Soniya, Jose Rani Babu, Joseph Roy, Jyothish Nelson, M. Jyothi Krishnan, K. Pranav Bhandary, K. M. Jamaludheen, Kavingal Ravi, Karthik Thrikkadeeri, Kausthubh K. Nair, B. S. Kiran, Kiran S. Kumar, D. Kishore Raj, Kishore Kumar Panaganti, M. Krishna Moorthy, R. Krishna Murthy, M. R. Krishnanunni, Latha Prabhakaran, K. K. Lathika, Libin Abraham, G. Hari Narayanan, Madhumita Panigrahi, S. Manav, Manoj Karingamadathil, T. R. Manoj, Manu Thomas, P. P. Manuel, Mebin George Varghese, P. Megha Chandran, M. Mohammad Sulaiman, Mohammed Ashif Madathil, V. K. Mohammed Hirash, K. Mohammed Ramees, M. Sadique Thirunnavaya, A. P. Muhammed Niyas, C. T. Muhasin, Mukundan Kizhakkemadham, Naseerudheen Abdul Azeez, P. V. Nikhil, C. Niranjana, Nisha Mundekad, Nithin Mohan, A. Pavithra, Poornima Viswanathan, P. Pramod, G. Prakash, S. Prasath, Prasoon Prakash, N. Preethi, Rahul Rajeevan, M. Rajaguru, V. Rajarajan, Raju Sankaran, K. Ratheesh, Rayan Pradeep Crasta, Remya Mohan, Anon Renju, Robin C. Koshy, Rohan Rai, Roshin Tom, Sachin Chandran, M. V. Sachinkrishna, M. V. Saeed Anvar Ali, Sajitha Siril, D. D. Samarth Bharadwaj, Samuel George, Sancia Morris, Sandeep Augustine, Sandeep K. Das, Sandie Morris, P. R. Sandra, T. K. Sanuraj, Saurabh Sawant, Savio Morris, K. Selvaganesh, K. Shahil, N. N. Shahina, Shahul Valasy, P. K. Siji, Siju Joseph, R. Sivashankar, Siyad A. Karim, Sreehari K. Mohan, Sreehari M. Pillai, M. Sri Sowmiya, K. T. Srinila, K. S. Subin, V. G. Sujith, Suryamol Sukumaran, M. S. Syamili, Tarun Menon, Tejas Praveen, S. A. Thilak, Tony Antony, U. R Ullas, Vinod Ooralath Sivaji, Vishnu Narayanan, M. Vishnu Sreejith, A. Vivek Chandran, Vivek Sudhakaran, R. Vridhi, Wahiba Irshad Humam, Yadukrishna J. Uchummal, and M. A. Yathumon

Subjects
Multidisciplinary
Published
2022
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