Users of X-ray photoelectron spectroscopy, I'm working on x-ray photoelectron spectroscopy (esclab 250 xi), and this instrument includes two x-ray anodes (anode X R6 and twin anode X R4). Therefore, my issue is when should we use anode X R6 and when should we use double anode X R4. What makes the difference in providing satisfying findings while evaluating samples?