Mxr50 End Window X-Ray Tube 

https://microxray.com/products/end-window-x-ray-tube - The MXR50 is an end window X-Ray tube designed for customers that require maximum flux, short FOD, and a wide beam angle. The large heat sink coupled with the nickel-plated bronze body provides efficient heat transfer enabling high power operation. We are always happy to help or advise on your specific x-ray requirements—from general to technical questions we are happy to help. For more information visit Micro X-Ray Inc.