Kittelmann, I.D. Baron, R.A. Bergman, E.C. Donegani, E.M. Grishin, V. Hassanzadegan, H. Kocevar, H. Milas, N. Miyamoto, R. Mohammednezhad, M. Nilen, F. Noll, D. Rosengren, K.E. Shea, T.J. Tarkeshian, R. Thomas, C.A. JACoW Publishing Geneva, Switzerland 2673-5350 978-3-95450-236-3 10.18429/JACoW-IBIC2023-TU1I02 English 136-141 DTL linac MMI MEBT neutron Contribution to a conference proceedings 2023 2023-12 https://doi.org/10.18429/JACoW-IBIC2023-TU1I02 https://jacow.org/ibic2023/papers/tu1i02.pdf Once constructed, the European Spallation Source (ESS) will be a 5MW pulsed neutron source based on a 2 GeV proton linac delivering 2.86 ms long pulses at a 14 Hz repetition rate. This paper focuses on the beam instrumentation performance during the recent linac beam commissioning up to drift tube linac (DTL) tank 4 with 74 MeV output energy. Instrumentation and measurement results will be presented for beam parameters such as current, position, energy, emittance and beam loss.