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		| Paper: | 
		Echellé Spectropolarimeter of the BTA Primary Focus: Purpose and Optical-Mechanical Construction | 
	 
	
		| Volume: | 
		510, Stars: From Collapse to Collapse | 
	 
	
		| Page: | 
		562 | 
	 
	
		| Authors: | 
		Panchuk, V. E.; Klochkova, V. G.; Yushkin, M. V.; Yakopov, G. V.; Verich, Yu. B.; Sachkov, M. E. | 
	 
	
	
		| Abstract: | 
		Here we present an optical layout and construction of the new echellé spectropolarimeter ESPRI of the primary focus of the Russian 6-m telescope BTA. We discuss its science case and state of art. The spectropolarimeter control system is realised based on NI myRIO-1900 controller and Xilinx Zyng-7010 CPU. | 
	 
	
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