We have 4 valid DR files for DR with unbunched beam. Iel = 500mA
run_0011.lmd
run_0012.lmd
run_0014.lmd
run_0015.lmd
corresponding ADC data for the DT voltages are available (ESR NUC).

NTCAP is stopped at ~22:30
(Plan: go back to bunched beam)

Below is a first offline analysis of the DR data of and of the intermediate cooling step (-900V) of unbunched beam.
The DR spectrum goes from Ecm = 24eV (channel 1) to 4 eV at channel (channel 1001)  with a stepwidth of 0.02 eV per channel (equidistant in the CM-frame). Thus 100 channels are 2 eV.
The other spectrum shows the intermediate cooling rate after each measurement step. 
The maximum of he peak is at about channel 520, i.e 24 eV - 5.2*2eV = 13.6 eV (expected ~17.8 eV). The peak is very broad. FWHM about 100 channels (2 eV). For comparison, the old data from 1998 had FWHM ~0.6 eV but limited due to density of the resonances - not experimental resolution.

The rising slope is the real RR (radiative recombination at non-zero energies) slope. There is no background from residual gas (verified in the bunching spectrum).
The intermediate cooling rate is about 2.5 to 3 times the rates in the DR spectrum. Expected was AT LEAST a factor 10 but rather a factor of 100 (one hundred). This finding is inline with the long beam lifetimes and the moderate breading efficiency.

Comment: In the analysis, I carefully checked all relevant raw-data spectra, in particular the timing pattern and the measured voltages. The raw data look extremely good (from a technical point-of-view)and agree with the settings. 
=> The new setup works very well.