Edited/tested part1

src/docs/part1/simple_detector.md

@@ -15,7 +15,13 @@ title: "Simple Detector Demo"
 
 ## Setup 
 
-Note all these commands assume you are in an `eic-shell` singularity session.
+*Note: this tutorial component assume you are in an `eic-shell` singularity session, and that you
+load the pre-compiled detector plugins from the container with*
+```bash
+source /opt/detector/setup.sh
+```
+
+First start by cloning part 1 of the tutorial.
 
 ```bash
 git clone https://eicweb.phy.anl.gov/EIC/tutorials/ip6_tutorial_1.git part1
@@ -37,9 +43,8 @@ directories named compact (but not always).
 ### Compile the detector library
 
 ```bash
-mkdir build
-cmake ../. -DCMAKE_INSTALL_PREFIX=../../local 
-make -j4 install
+cmake -B build -DCMAKE_INSTALL_PREFIX=../local/ -S . -DCMAKE_CXX_STANDARD=17
+cmake --build build -j4 -- install
 ```
 
 ## Visualize and Check Geometry
@@ -167,7 +172,7 @@ detector.fromCompact("gem_tracker.xml");
 dd4hep::rec::CellIDPositionConverter cellid_converter(detector);
 ```
 
-This 
+This accomplishes the following:
   - gets the main [DD4hep Detector](https://dd4hep.web.cern.ch/dd4hep/reference/classdd4hep_1_1Detector.html) instance
   - loads the compact detector file
   - initializes the [position converter tool](https://dd4hep.web.cern.ch/dd4hep/reference/classdd4hep_1_1rec_1_1CellIDPositionConverter.html) (which provides thread safe access)
@@ -271,7 +276,7 @@ Looking at the id specification we see the following:
 <segmentation type="PolarGridRPhi" grid_size_phi="3.0*degree" grid_size_r="5.0*cm"/>
 <id>system:5,barrel:3,layer:4,module:5,r:32:-16,phi:-16</id>
 ```
-This means there are 5 bits associated with system (this is the `<detector>`'s `id`) this field is mandatory but can differ from 5 bits.
+This means there are 5 bits associated with system (this is the `<detector>`'s `id`). The field is mandatory but can differ from 5 bits.
 The subsequent  fields are arbitrary but should result in a unique 64 bit integer.
 Here 3 bits for the "barrel", 4 bits for a "layer", 5 bits for the "module". 
 More bit fields could be allocated if desired (in part 2 it will become clear why we might want to do this).