2010.03.16 - Tune Scan Analysis

Summary:

• High-res tune scan of 1% sextupole errors
• High-res tune scan of 3MV, 8MV xr20m lattices
• Overlay of 2009.12.22 xBSM measurements on ideal tune plane

Repeat "1% sextupole K2 error" tune scan from 2010.03.11, using a finer resolution. (Previously, dQ = 2.e-3. Now, dQ = 5.e-4). Use standard amplitudes:

• x_amp = 5.e-3
• y_amp = 5.e-3
• z_amp = 2.5e-3

Color scales: x_cutoff = 2.5; y_cutoff = 2.5.

Compare to the ideal (error-free) lattice:

Using the ideal XR20m lattice, change total RF voltage from 6.4MV to 3MV and 8MV. Run high-resolution (dQ = 5.e-4) tune scans on both.

RF @ 3MV

RF @ 8MV

Overlay the "beamsize vs. tunes" measurements from 2009.12.22 (eLog entry) onto the ideal 1/2-2/3 tune plane. Color scales for the tune plane and measurements are not identical, but are proportional. (red measurement is means larger beamsize than blue measurement, etc.)