Design and modelling of novel evacuated receiver tube of concentration solar power system by using heliostat stadium arrangementAyad Kadhim Khlief, Syed Ihtsham- ul-Haq Gilani, Hussain H. Al-Kayiem and Sanan T. MohammadMATEC Web Conf., 131 (2017) 02002DOI: https://doi.org/10.1051/matecconf/201713102002