Completed-Theses.md

 ## Supervised Theses (since Oct. 2014)
 
 ### PhD
+* *Development of a Silicon Photomultipllier based Scintillator Detector for Cosmic Air Showers* 
+(Julian Kemp, July 2020, 3a)
+
 * *Development of scintillator detectors for measuring muons and air showers*
 (Christine Peters, Mai 2019, 3a)
 [[pdf](https://git.rwth-aachen.de/tbretz/research/raw/master/Theses/PhD/Christine Peters.pdf)]
@@ -14,6 +17,7 @@
 [[pdf](https://git.rwth-aachen.de/tbretz/research/raw/master/Theses/PhD/Lukas Middendorf.pdf)]
 
 
+
 ### Master theses
 
 * *Commissioning of two improved HAWC's Eye telescopes in a hybrid setup with the HAWC gamma-ray observatory*