From 36c612c3241b9566b25ad3fe7214316c8d36436f Mon Sep 17 00:00:00 2001
From: arrell_c <christopher.arrell@psi.ch>
Date: Wed, 11 Dec 2024 12:53:39 +0100
Subject: [PATCH] Create Aramis spatial diagnostics/Chat about screens

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+# **SwissFEL Photon Screens: The Inside Scoop**
+
+**👩‍🔬 User:**  
+We need to measure the X-ray beam profile… what gadgets are we working with?  
+
+**👨‍🏫 Diagnostics Ninja:**  
+Ah, welcome to the **Photon Screen Family**—each one’s got a job and an attitude:  
+
+---
+
+### **1️⃣ PSCR – The Nosy Traveler**  
+
+**👩‍🔬 User:**  
+What’s a PSCR? Sounds like a covert spy cam.  
+
+**👨‍🏫 Diagnostics Ninja:**  
+*Exactly!* It **moves with the screen** like it’s following the X-ray beam on tour. You’ll find these mainly in **Athos** after mirrors, measuring beams at different **deflection angles.** It’s basically a beam paparazzi with a zoom lens.  
+
+**👩‍🔬 User:**  
+So, flexible but kinda nosy?  
+
+**👨‍🏫 Diagnostics Ninja:**  
+Yep! It’s like that friend who’s *always* at the perfect spot for group selfies—but sometimes forgets to check for photobombers (a.k.a. stray light coming down the beam tube).  
+
+---
+
+### **2️⃣ PPRM – The Stationary Supervisor**  
+
+**👩‍🔬 User:**  
+PPRM? Sounds serious.  
+
+**👨‍🏫 Diagnostics Ninja:**  
+*Oh, it is.* It’s **locked in place**, keeping its **camera fixed** while the screen **moves into the beam.** You’ll find these mainly at **Aramis**, holding down the fort like the team lead who never leaves their desk.  
+
+**👩‍🔬 User:**  
+Sounds pretty steady…  
+
+**👨‍🏫 Diagnostics Ninja:**  
+Very. Imaging the **front face of a YAG crystal** means it gets a **clearer signal** with minimal background interference. No distractions, just X-rays.  
+
+---
+
+### **3️⃣ PSCA – The Precision Diva**  
+
+**👩‍🔬 User:**  
+And PSCA? Fancy name... what’s its deal?  
+
+**👨‍🏫 Diagnostics Ninja:**  
+*Oh, PSCA is the perfectionist.* It uses **SmarAct motors** for **micron-level reproducibility.** Its camera stays *super fixed* like it’s meditating. PSCA can image **both the alignment laser and the X-ray beam**, flexing its multi-tasking skills.  
+
+**👩‍🔬 User:**  
+So, like... the valedictorian of photon screens?  
+
+**👨‍🏫 Diagnostics Ninja:**  
+Yep—straight-A student who probably drinks herbal tea to “stay focused.”  
+
+---
+
+### **Bonus: PSRD – The Underdog Detector**  
+
+**👩‍🔬 User:**  
+Wait... PSRD? What’s that, a sidekick?  
+
+**👨‍🏫 Diagnostics Ninja:**  
+More like a **specialist.** It measures **weak X-ray beams**, like **spontaneous radiation.** It’s mainly used for **undulator alignment** and **calibration**, but recently, it’s been moonlighting as a low-energy detector for the **PMOS spectrometer.**  
+
+**👩‍🔬 User:**  
+Sounds like an underappreciated genius.  
+
+**👨‍🏫 Diagnostics Ninja:**  
+Totally. It’s like that quiet team member who shows up at just the right moment with the solution... *when you thought they were asleep.*  
+
+---
+
+**👩‍🔬 User:**  
+Alright, so PSCR for flexibility, PPRM for stability, PSCA for precision, and PSRD for the underdog moments?  
+
+**👨‍🏫 Diagnostics Ninja:**  
+You got it! Welcome to SwissFEL—where even the screens have *main-character energy.*  
+
+---
+
+**✅ Do Say:**  
+*"I’m using PSCR after the mirrors at Athos to measure different deflection angles."*  
+
+**❌ Don’t Say:**  
+*"PSCR is basically a periscope with trust issues."*  
+
+**✅ Do Say:**  
+*"PPRM works well for stable, fixed-position beam profiling at Aramis."*  
+
+**❌ Don’t Say:**  
+*"PPRM never moves… just like my motivation after lunch."*  
+
+**✅ Do Say:**  
+*"PSCA ensures precise, reproducible measurements with micron accuracy."*  
+
+**❌ Don’t Say:**  
+*"PSCA is like that overachiever who can’t chill."*  
+
+**✅ Do Say:**  
+*"PSRD is ideal for weak X-ray detection and undulator calibration."*  
+
+**❌ Don’t Say:**  
+*"PSRD: The X-ray beam’s emotional support detector."*